Optical imaging system

ABSTRACT

An optical imaging system includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens, arranged in order from an object side, wherein the first lens and the second lens each have positive refractive power, and 15&lt;v7-v8&lt;25 is satisfied, where v7 indicates an Abbe number of the seventh lens, and v8 indicates an Abbe number of the eighth lens.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit under 35 USC 119(a) of Korean PatentApplication No. 10-2021-0181062 filed on Dec. 16, 2021, in the KoreanIntellectual Property Office, the entire disclosure of which isincorporated herein by reference for all purposes.

BACKGROUND 1. Field

The present disclosure relates to an optical imaging system.

2. Description of the Background

A portable terminal may be equipped with a camera module including anoptical imaging system including a plurality of lenses to make videocalls and capture images.

As the camera module has gradually been integrated with more functionsin the portable terminal, there has been increasing demand for a cameramodule for a mobile terminal having high resolution.

In addition, as portable terminals are getting smaller, and cameramodules for portable terminals are also required to be slim, thedevelopment of an optical imaging system capable of implementing highresolution while being slimmed is required.

The above information is presented as background information only toassist with an understanding of the present disclosure. No determinationhas been made, and no assertion is made, as to whether any of the abovemight be applicable as prior art with regard to the disclosure.

SUMMARY

This Summary is provided to introduce a selection of concepts insimplified form that are further described below in the DetailedDescription. This Summary is not intended to identify key features oressential features of the claimed subject matter, nor is it intended tobe used as an aid in determining the scope of the claimed subjectmatter.

In one general aspect, an optical imaging system includes a first lens,a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens,a seventh lens, an eighth lens, and a ninth lens, arranged in order froman object side, wherein the first lens and the second lens each havepositive refractive power, and wherein 15<v7-v8<25 is satisfied, wherev7 indicates an Abbe number of the seventh lens, and v8 indicates anAbbe number of the eighth lens.

25<v1-v3<45 may be satisfied, where v1 indicates an Abbe number of thefirst lens, and v3 indicates an Abbe number of the third lens.

At least one of 25<v1-v5<45 and 15<v1-v6<25 may be satisfied, where v5indicates an Abbe number of the fifth lens, and v6 indicates an Abbenumber of the sixth lens.

|f1/f2|<1.0 may be satisfied, where f1 indicates a focal length of thefirst lens, and f2 indicates a focal length of the second lens.

0<f1/f<1.4 and 5<f2/f<50 may be satisfied, where f indicates a totalfocal length of the optical imaging system.

−5<f3/f<0 may be satisfied, where f3 indicates a focal length of thethird lens.

−2.0<f2/f3<0 may be satisfied.

At least one of |f4/f|>50.0, −25<f5/f<0, |f6/f|>2.0, and f7/f<5.0 may besatisfied, where f4 indicates a focal length of the fourth lens, f5indicates a focal length of the fifth lens, f6 indicates a focal lengthof the sixth lens, and f7 indicates a focal length of the seventh lens.

D1/f<0.1 may be satisfied, where f indicates the total focal length ofthe optical imaging system, and D1 indicates a distance on an opticalaxis between an image-side surface of the first lens and an object-sidesurface of the second lens.

D7/f<0.1 may be satisfied, where f indicates the total focal length ofthe optical imaging system, and D7 indicates a distance on an opticalaxis between an image-side surface of the seventh lens and anobject-side surface of the eighth lens.

TTL/f<1.2 and BFL/f<0.3 may be satisfied, where TTL indicates a distanceon an optical axis from an object-side surface of the first lens to animaging plane, and BFL indicates a distance on the optical axis from animage-side surface of the ninth lens to the imaging plane.

D6-D1-D2>0.2 mm may be satisfied, where D1 indicates the distance on anoptical axis between an image-side surface of the first lens and anobject-side surface of the second lens, D2 indicates a distance on theoptical axis between an image-side surface of the second lens and anobject-side surface of the third lens, and D6 indicates a distance onthe optical axis between an image-side surface of the sixth lens and anobject-side surface of the seventh lens.

SA11/CT1>40°/mm may be satisfied, where SA11 indicates a sweep angle ofthe first lens at an end of an effective diameter of its object-sidesurface, and CT1 indicates a thickness on an optical axis of the firstlens.

SA92/CT9>50°/mm may be satisfied, where SA92 indicates a sweep angle ofthe ninth lens at an end of an effective diameter of its image-sidesurface, and CT9 indicates a thickness on an optical axis of the ninthlens.

SAG11/CT1>0.7 may be satisfied, where SAG11 indicates an SAG value ofthe first lens at the end of the effective diameter of its object-sidesurface, and CT1 indicates the thickness on an optical axis of the firstlens.

The third lens may have negative refractive power, and the fourth lensmay have positive or negative refractive power, and |f3|<|f4| may besatisfied, where f3 indicates the focal length of the third lens, and f4indicates the focal length of the fourth lens.

The third lens may have negative refractive power, the fourth lens mayhave positive or negative refractive power, the fifth lens may havenegative refractive power, the sixth lens may have positive refractivepower, the seventh lens may have positive refractive power, the eighthlens may have positive or negative refractive power, and the ninth lensmay have negative refractive power.

In another general aspect, an optical imaging system includes a firstlens, a second lens, a third lens, a fourth lens, a fifth lens, a sixthlens, a seventh lens, an eighth lens, and a ninth lens, arranged inorder from an object side, wherein the first lens and the second lenseach have positive refractive power, the seventh lens has an Abbe numberdifferent from an Abbe number of the eighth lens, and 0.5<L7S2/L8S1<1.2is satisfied, where L7S2 indicates a radius of curvature of animage-side surface of the seventh lens, and L8S1 indicates a radius ofcurvature of an object-side surface of the eighth lens.

The image-side surface of the seventh lens and the object-side surfaceof the eighth lens may each have at least one inflection point in aregion other than its paraxial region.

The third lens may have negative refractive power, and |f3|<|f4|,25<v1-v3<45, and 15<v7-v8<25 may be satisfied, where v1 indicates anAbbe number of the first lens, v3 indicates an Abbe number of the thirdlens, v7 indicates an Abbe number of the seventh lens, v8 indicates anAbbe number of the eighth lens, f3 indicates a focal length of the thirdlens, and f4 indicates a focal length of the fourth lens.

In another general aspect, an optical imaging system includes a firstlens, a second lens, a third lens, a fourth lens, a fifth lens, a sixthlens, a seventh lens, an eighth lens, and a ninth lens, arranged inorder from an object side, wherein the sixth lens and the seventh lenseach have positive refractive power, convex object-side surfaces, andconcave image-side surfaces.

The fourth lens may have a concave object-side surface and a conveximage-side surface, and the eighth lens may have a convex object-sidesurface and a concave image-side surface.

The first lens and the second lens may each have positive refractivepower, and the third lens, the fifth lens, and the ninth lens may eachhave negative refractive power.

15<v7-v8<25 may be satisfied, where v7 indicates an Abbe number of theseventh lens, and v8 indicates an Abbe number of the eighth lens.

The seventh lens may have an Abbe number different from an Abbe numberof the eighth lens, and 0.5<L7S2/L8S1<1.2 may be satisfied, where L7S2indicates a radius of curvature of an image-side surface of the seventhlens, and L8S1 indicates a radius of curvature of an object-side surfaceof the eighth lens.

One or more of ℄f3|<|f4|, 25<v1-v5<45, and 15<v1-v6<25 are satisfied,where f3 indicates a focal length of the third lens, f4 indicates afocal length of the fourth lens, v1 indicates an Abbe number of thefirst lens, v5 indicates an Abbe number of the fifth lens, and v6indicates an Abbe number of the sixth lens.

Other features and aspects will be apparent from the following detaileddescription, the drawings, and the claims.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram of an optical imaging system according to afirst example embodiment of the present disclosure.

FIG. 2 shows graphs having curves representing aberrationcharacteristics of the optical imaging system illustrated in FIG. 1 .

FIG. 3 is a block diagram of an optical imaging system according to asecond example embodiment of the present disclosure.

FIG. 4 shows graphs having curves representing aberrationcharacteristics of the optical imaging system illustrated in FIG. 3 .

FIG. 5 is a block diagram of an optical imaging system according to athird example embodiment of the present disclosure.

FIG. 6 shows graphs having curves representing aberrationcharacteristics of the optical imaging system illustrated in FIG. 5 .

FIG. 7 is a block diagram of an optical imaging system according to afourth example embodiment of the present disclosure.

FIG. 8 shows graphs having curves representing aberrationcharacteristics of the optical imaging system illustrated in FIG. 7 .

FIG. 9 is a block diagram of an optical imaging system according to afifth example embodiment of the present disclosure.

FIG. 10 shows graphs having curves representing aberrationcharacteristics of the optical imaging system illustrated in FIG. 9 .

FIG. 11 is a block diagram of an optical imaging system according to asixth example embodiment of the present disclosure.

FIG. 12 shows graphs having curves representing aberrationcharacteristics of the optical imaging system illustrated in FIG. 11 .

FIG. 13 is a block diagram of an optical imaging system according to aseventh example embodiment of the present disclosure.

FIG. 14 shows graphs having curves representing aberrationcharacteristics of the optical imaging system illustrated in FIG. 13 .

FIG. 15 is a view showing a sweep angle at a specific position on a lenssurface.

Throughout the drawings and the detailed description, the same referencenumerals refer to the same elements. The drawings may not be to scale,and the relative sizes, proportions, and depictions of elements in thedrawings may be exaggerated for clarity, illustration, and convenience.

DETAILED DESCRIPTION

Hereinafter, while example embodiments of the present disclosure aredescribed in detail with reference to the accompanying illustrativedrawings, it is noted that examples are not limited to the same.

The following detailed description is provided to assist the reader ingaining a comprehensive understanding of the methods, apparatuses,and/or systems described herein. However, various changes,modifications, and equivalents of the methods, apparatuses, and/orsystems described herein will be apparent after an understanding of thisdisclosure. For example, the sequences of operations described hereinare merely examples, and are not limited to those set forth herein, butmay be changed as will be apparent after an understanding of thisdisclosure, with the exception of operations necessarily occurring in acertain order. Also, descriptions of features that are known in the artmay be omitted for increased clarity and conciseness.

The features described herein may be embodied in different forms, andare not to be construed as being limited to the examples describedherein. Rather, the examples described herein have been provided merelyto illustrate some of the many possible ways of implementing themethods, apparatuses, and/or systems described herein that will beapparent after an understanding of this disclosure.

Throughout the specification, when an element, such as a layer, region,or substrate is described as being “on,” “connected to,” or “coupled to”another element, it may be directly “on,” “connected to,” or “coupledto” the other element, or there may be one or more other elementsintervening therebetween. In contrast, when an element is described asbeing “directly on,” “directly connected to,” or “directly coupled to”another element, there can be no other elements interveningtherebetween.

As used herein, the term “and/or” includes any one and any combinationof any two or more of the associated listed items; likewise, “at leastone of” includes any one and any combination of any two or more of theassociated listed items.

Although terms such as “first,” “second,” and “third” may be used hereinto describe various members, components, regions, layers, or sections,these members, components, regions, layers, or sections are not to belimited by these terms. Rather, these terms are only used to distinguishone member, component, region, layer, or section from another member,component, region, layer, or section. Thus, a first member, component,region, layer, or section referred to in examples described herein mayalso be referred to as a second member, component, region, layer, orsection without departing from the teachings of the examples.

Spatially relative terms, such as “above,” “upper,” “below,” “lower,”and the like, may be used herein for ease of description to describe oneelement's relationship to another element as shown in the figures. Suchspatially relative terms are intended to encompass differentorientations of the device in use or operation in addition to theorientation depicted in the figures. For example, if the device in thefigures is turned over, an element described as being “above,” or“upper” relative to another element would then be “below,” or “lower”relative to the other element. Thus, the term “above” encompasses boththe above and below orientations depending on the spatial orientation ofthe device. The device may also be oriented in other ways (rotated 90degrees or at other orientations), and the spatially relative terms usedherein are to be interpreted accordingly.

The terminology used herein is for describing various examples only, andis not to be used to limit the disclosure. The articles “a,” “an,” and“the” are intended to include the plural forms as well, unless thecontext clearly indicates otherwise. The terms “comprises,” “includes,”and “has” specify the presence of stated features, numbers, operations,members, elements, and/or combinations thereof, but do not preclude thepresence or addition of one or more other features, numbers, operations,members, elements, and/or combinations thereof.

Due to manufacturing techniques and/or tolerances, variations of theshapes shown in the drawings may occur. Thus, the examples describedherein are not limited to the specific shapes shown in the drawings, butinclude changes in shape that occur during manufacturing.

Herein, it is noted that use of the term “may” with respect to anexample, for example, as to what an example may include or implement,means that at least one example exists in which such a feature isincluded or implemented while all examples are not limited thereto.

The features of the examples described herein may be combined in variousways as will be apparent after an understanding of this disclosure.Further, although the examples described herein have a variety ofconfigurations, other configurations are possible as will be apparentafter an understanding of this disclosure.

An aspect of the present disclosure may provide an optical imagingsystem having a high resolution.

In the drawings, the thickness, size and shape of a lens are somewhatexaggerated for convenience of explanation. For example, a shape of aspherical surface or an aspherical surface, illustrated in the drawings,is only illustrative. That is, the shape of the spherical surface or theaspherical surface is not limited to that illustrated in the drawings.

An optical imaging system according to an example embodiment of thepresent disclosure may include nine lenses.

A first lens may indicate a lens disposed closest to an object side, anda ninth lens may indicate a lens disposed closest to an imaging plane(or image sensor).

In addition, a first surface of each lens may indicate its surfaceclosest to the object side (or object-side surface) and a second surfaceof each lens may indicate its surface closest to an image side (orimage-side surface). In addition, all numerical values of the radius ofcurvature, thickness, distance, focal length, and the like of the lensesmay be indicated by millimeters (mm), and a field of view (FOV) may beindicated by degrees.

Further, in a description for a shape of each lens, one surface of alens, having a convex shape, may indicate that a paraxial region portionof the corresponding surface is convex, and one surface of a lens,having a concave shape, may indicate that a paraxial region portion ofthe corresponding surface is concave.

Therefore, although it is described that one surface of a lens isconvex, an edge portion of the lens may be concave. Likewise, althoughit is described that one surface of a lens is concave, an edge portionof the lens may be convex.

A paraxial region may indicate a very narrow region in the vicinity ofan optical axis and including the optical axis.

The imaging plane may indicate a virtual plane where a focus is formedby the optical imaging system. Alternatively, the imaging plane mayindicate one surface of the image sensor, on which light is received.

The optical imaging system according to an example embodiment of thepresent disclosure may include nine lenses.

For example, the optical imaging system according to an exampleembodiment of the present disclosure may include a first lens, a secondlens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventhlens, an eighth lens and a ninth lens, arranged in order from the objectside. The first lens to the ninth lens may respectively be arranged tobe spaced apart from each other by a predetermined distance along theoptical axis.

The optical imaging system according to an example embodiment of thepresent disclosure may further include the image sensor for convertingan image of an incident subject into an electrical signal.

In addition, the optical imaging system may further include an infraredfilter (hereinafter, filter) blocking an infrared ray. The filter may bedisposed between the ninth lens and the image sensor.

In addition, the optical imaging system may further include an aperturefor adjusting an amount of light.

The first lens and the second lens may respectively have positiverefractive power. Both the first lens and the second lens may havepositive refractive power, and thus have sufficient light collectingability.

Unlike the present disclosure, when the first lens has positiverefractive power and the second lens has negative refractive power, thefirst lens may have very strong positive refractive power. In this case,the first lens may have reduced productivity due to its increasedsensitivity.

In addition, a focal length of the first lens may be shorter than afocal length of the second lens. That is, when the first lens hasstronger positive refractive power than that of the second lens, thefirst lens may have the sufficient light collecting ability whilereducing sensitivity thereof.

The lenses included in the optical imaging system according to anexample embodiment of the present disclosure may each be made ofplastic.

In particular, the third to eighth lenses may each be made of plastichaving optical characteristics different from those of the lensesdisposed adjacent thereto. Therefore, the lenses may appropriatelycorrect chromatic aberration to improve color characteristics.

For example, the third lens and the fifth lens may each be made ofplastic having a high refractive index and a low dispersion value. Forexample, the third lens and the fifth lens may each have a refractiveindex greater than 1.64, and an Abbe number less than 21.

The fourth lens, the seventh lens and the ninth lens may each be made ofplastic having a high dispersion value, and the sixth lens and theeighth lens may each be made of plastic having a medium dispersionvalue.

The optical imaging system according to an example embodiment of thepresent disclosure may have an Fno smaller than 2.0, and the opticalimaging system may thus be made brighter. In an example embodiment, theoptical imaging system may have the Fno greater than or equal to 1.7 andless than 2.0. The Fno may indicate an F-number of the optical imagingsystem.

The optical imaging system according to an example embodiment of thepresent disclosure may have the field of view greater than 70° . In anexample embodiment, the optical imaging system may have the field ofview greater than 70° and smaller than 80°.

All the lenses of the optical imaging system according to an exampleembodiment of the present disclosure may each have an asphericalsurface. For example, the first to ninth lenses may each have at leastone aspherical surface.

That is, at least one of the first and second surfaces of the first toninth lenses may be the aspherical surface. Here, the asphericalsurfaces of the first to ninth lenses may be expressed by Equation 1below.

$\begin{matrix}{Z = {\frac{cY^{2}}{1 + \sqrt{1 - {\left( {1 + K} \right)c^{2}Y^{2}}}} + {AY^{4}} + {BY^{6}} + {CY}^{8} + {DY^{10}} + {EY^{12}} + {FY^{14}} + {GY^{16}} + {HY^{18}} + {JY^{20}} + {LY^{22}} + {MY^{24}} + {NY^{26}} + {OY}^{28} + {PY^{30}}}} & {{Equation}1}\end{matrix}$

In Equation 1, “c” may indicate a curvature (reciprocal of the radius ofcurvature) of the lens, “K” may indicate a conic constant, and “Y” mayindicate a distance from any point on the aspherical surface of the lensto the optical axis. In addition, each of constants “A” to “H”, “J”, and“L” to “P” may indicate a coefficient of the aspherical surface. Inaddition, “Z” may indicate a distance from any point on the asphericalsurface of the lens to a vertex of the aspherical surface in an opticalaxis direction.

In an example embodiment, the optical imaging system may satisfy acondition of 0<f1/f<1.4. Here, “f” may indicate an overall focal lengthof the optical imaging system, and fl may indicate the focal length ofthe first lens. Accordingly, the optical imaging system may have thesufficient light collecting ability.

In an example embodiment, the optical imaging system may satisfy atleast one of conditions 25<v1-v3<45, 25<v1-v5<45, 15<v1-v6<25, and15<v7-v8<25. Here, v1 may indicate an Abbe number of the first lens, v3may indicate the Abbe number of the third lens, v5 may indicate the Abbenumber of the fifth lens, v6 may indicate an Abbe number of the sixthlens, v7 may indicate an Abbe number of the seventh lens, and v8 mayindicate an Abbe number of the eighth lens. Therefore, the lens mayappropriately correct the chromatic aberration to improve colorcharacteristics.

In an example embodiment, the optical imaging system may satisfy acondition of 5<f2/f<50. Here, f2 may indicate the focal length of thesecond lens. Accordingly, the second lens may appropriately correct theaberration occurring by the first lens.

In an example embodiment, the optical imaging system may satisfy acondition of −5<f3/f<0. Here, f3 may indicate the focal length of thethird lens. Accordingly, the third lens may maintain an appropriatelevel of the refractive power, thus improving its aberration correctionability.

In an example embodiment, the optical imaging system may satisfy acondition of |f4/f|>50.0. Here, f4 may indicate the focal length of thefourth lens. It may be inferred that the fourth lens has the positive ornegative refractive power from an absolute value indicated in the abovecondition. The fourth lens may have an appropriate level of refractivepower to improve aberration correction ability thereof.

In an example embodiment, the optical imaging system may satisfy thecondition −25<f5/f<0. Here, f5 may indicate the focal length of thefifth lens. Accordingly, the fifth lens may maintain an appropriatelevel of the refractive power, thus improving its aberration correctionability.

In an example embodiment, the optical imaging system may satisfy acondition of |f6/f|>2.0. Here, f6 may indicate the focal length of thesixth lens. The sixth lens may thus have an appropriate level of therefractive power to improve its aberration correction ability.

In an example embodiment, the optical imaging system may satisfy acondition of f7/f<5.0. Here, f7 may indicate the focal length of theseventh lens. The seventh lens may thus have an appropriate level of therefractive power to improve its aberration correction ability.

In an example embodiment, the optical imaging system may satisfy acondition of |f1/f2|<1.0. That is, the focal length of the first lensmay be shorter than the focal length of the second lens. If the focallength of the second lens is too short (i.e., if the second lens hasstrong refractive power), it is difficult to improve the aberration.

In an example embodiment, the optical imaging system may satisfy acondition of −2.0<f1/f3<0.0. Accordingly, the first lens and the thirdlens may each maintain their appropriate levels of the refractive power,thus improving an image quality.

In an example embodiment, the optical imaging system may satisfy acondition of TTL/f<1.2. Here, TTL may indicate a distance from theobject-side surface of the first lens to the imaging plane in theoptical axis direction. Accordingly, the optical imaging system may bemade slim while including the first to ninth lenses.

In an example embodiment, the optical imaging system may satisfy acondition of BFL/f<0.3. Here, BFL may indicate a distance from theimage-side surface of the ninth lens to the imaging plane in the opticalaxis direction. Accordingly, the optical imaging system may be made slimwhile including the first to ninth lenses.

In an example embodiment, the optical imaging system may satisfy acondition of D1/f<0.1. Here, D1 may indicate a distance between theimage-side surface of the first lens and the object-side surface of thesecond lens in the optical axis direction. Accordingly, it is possibleto appropriately correct a longitudinal chromatic aberration in aparaxial region.

In an example embodiment, the optical imaging system may satisfy acondition of D7/f<0.1. Here, D7 may indicate a distance between theimage-side surface of the seventh lens and the object-side surface ofthe eighth lens in the optical axis direction. Accordingly, it ispossible to appropriately correct the longitudinal chromatic aberrationin the paraxial region.

In an example embodiment, the optical imaging system may satisfy acondition of D6-D1-D2>0.2 mm. Here, D1 may indicate the distance betweenthe image-side surface of the first lens and the object-side surface ofthe second lens in the optical axis direction, D2 may indicate adistance between the image-side surface of the second lens and theobject-side surface of the third lens in the optical axis direction, andD6 may indicate a distance between the image-side surface of the sixthlens and the object-side surface of the seventh lens in the optical axisdirection. Accordingly, it is possible to improve the aberrationcorrection ability thereof.

In an example embodiment, the optical imaging system may satisfy acondition of SA11/CT1>40°/mm. Here, SA11 may indicate a sweep angle ofthe first lens at an end of an effective diameter of its object-sidesurface, and CT1 may indicate a thickness of the first lens in theoptical axis direction. Accordingly, it is possible to improve theaberration correction ability.

In an example embodiment, the optical imaging system may satisfy acondition of SA92/CT9>50°/mm. Here, SA92 may indicate a sweep angle ofthe ninth lens at an end of an effective diameter of its image-sidesurface, and CT9 may indicate a thickness of the ninth lens in theoptical axis direction. Accordingly, it is possible to improve theaberration correction ability.

FIG. 15 shows a sweep angle of the lens at a specific position on itssurface. For example, the sweep angle of the ninth lens at the end ofthe effective diameter of its image-side surface may be defined as anangle formed between a normal TL1 at a vertex of its image-side surfaceand a normal TL2 at the end of its effective diameter.

When the lens has the convex object-side surface, its sweep angle mayhave a positive value, and when the lens has the concave object-sidesurface, its sweep angle may have a negative value.

In addition, when the lens has the convex image-side surface, its sweepangle may have the negative value, and when the lens has the concaveimage-side surface, its sweep angle may have the positive value.

In an example embodiment, the optical imaging system may satisfy acondition of SAG11/CT1>0.70. Here, SAG11 may indicate an SAG value ofthe first lens at the end of the effective diameter of its object-sidesurface. Accordingly, it is possible to improve the aberrationcorrection ability.

When the lens has the convex object-side surface, the SAG value measuredat any position on the object-side surface may have the positive value,and when the lens has the concave object-side surface, the SAG valuemeasured at any position on the object-side surface may have thenegative value.

In addition, when the lens has the convex image-side surface, the SAGvalue measured at any position on the image-side surface may have thenegative value, and when the lens has the concave image-side surface,the SAG value measured at any position on the image-side surface mayhave the positive value.

In an example embodiment, the optical imaging system may satisfy acondition of L7S2/L8S1>0. The optical imaging system may satisfy acondition of 0.5<L7S2/L8S1<1.2. Here, L7S2 may indicate a radius ofcurvature of the image-side surface of the seventh lens, and L8S1 mayindicate a radius of curvature of the object-side surface of the eighthlens. Accordingly, the seventh lens and the eighth lens may eachmaintain their appropriate levels of the refractive power, thusimproving image quality.

In an example embodiment, the image-side surface of the seventh lens andthe object-side surface of the eighth lens may have similar shapes andbe disposed to be disposed close to each other. In addition, a syntheticfocal length of the seventh and eighth lenses may have the positivevalue.

In an example embodiment, the optical imaging system may satisfy acondition of f1>f12. Here, f12 may indicate a synthetic focal length ofthe first lens and the second lens.

In an example embodiment, the optical imaging system may satisfy acondition of |f3|<|f4|. Here, f3 may indicate the focal length of thethird lens, and f4 may indicate the focal length of the fourth lens.

An optical imaging system 100 according to a first example embodiment ofthe present disclosure is described with reference to FIGS. 1 and 2 .

The optical imaging system 100 according to the first example embodimentof the present disclosure may include a first lens 110, a second lens120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens160, a seventh lens 170, an eighth lens 180, and a ninth lens 190, andmay further include the aperture, a filter IRCF, and an image sensor IS.

The optical imaging system 100 according to the first example embodimentof the present disclosure may form the focus on an imaging plane 191.The imaging plane 191 may indicate a surface on which the focus isformed by the optical imaging system. For example, the imaging plane 191may indicate one surface of the image sensor IS, on which light isreceived.

Tables 1 and 2 show characteristics of each lens (e.g., radius ofcurvature, thickness of the lens or distance between the lenses,refractive index, Abbe number, and focal length).

TABLE 1 Surface Radius of Thickness or Refractive Abbe Focal no. Itemcurvature distance index no. length S1  First lens 2.734 0.920 1.54656.0 6.202 S2  12.479 0.065 S3  Second 12.093 0.280 1.546 56.0 129.516lens S4  14.467 0.062 S5  Third lens 9.129 0.260 1.687 18.4 −14.934 S6 4.775 0.466 S7  Fourth −48.000 0.325 1.546 56.0 −933.596 lens S8 −53.114 0.278 S9  Fifth lens 50.934 0.400 1.667 20.4 −51.789 S10 20.5180.587 S11 Sixth lens 11.504 0.500 1.570 37.4 70.584 S12 15.852 0.517 S13Seventh 3.582 0.452 1.546 56.0 8.946 lens S14 12.821 0.092 S15 Eighth17.000 0.380 1.570 37.4 −886.213 lens S16 16.313 0.769 S17 Ninth lens6.016 0.503 1.546 56.0 −5.912 S18 2.039 0.370 S19 Filter Infinity 0.1101.518 64.2 S20 Infinity 0.790 S21 Imaging Infinity plane

TABLE 2 f 6.897 f12 5.915 FOV 75.1 SAG11 0.769 SA11 41.6 SA12 6.9 SA218.1 SA22 3.4 SA31 16.8 SA32 28.2 SA41 10.3 SA42 17 SA51 39.7 SA52 32.9SA61 36.5 SA62 21.5 SA71 25.6 SA72 46.9 SA81 43.9 SA82 32.8 SA91 19.1SA92 28.2

In Table 2, “f” may indicate a total focal length of the optical imagingsystem, f12 may indicate the synthetic focal length of the first andsecond lenses, FOV may indicate the field of view of the optical imagingsystem, and SAG11 may indicate the SAG value obtained at the end of theeffective diameter of the object-side surface of the first lens.

In addition, SA11 to SA92 indicate the sweep angles of the respectivelenses at the ends of the effective diameters of their object-sidesurfaces and image-side surfaces in order from the first to ninthlenses. For example, SA11 may indicate the sweep angle of the first lensat the end of the effective diameter of its object-side surface, andSA12 may indicate a sweep angle of the first lens at the end of theeffective diameter of its image-side surface.

1.82 is an Fno of the optical imaging system 100 according to the firstexample embodiment of the present disclosure.

In the first example embodiment of the present disclosure, the firstlens 110 may have positive refractive power, and the convex firstsurface and the concave second surface.

The second lens 120 may have positive refractive power, and the convexfirst surface and the concave second surface.

The third lens 130 may have negative refractive power, and the convexfirst surface and the concave second surface.

The fourth lens 140 may have negative refractive power, and the concavefirst surface and the convex second surface.

The fifth lens 150 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the fifth lens 150. For example, the first surface of thefifth lens 150 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the fifthlens 150 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The sixth lens 160 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the sixth lens 160. For example, the first surface of thesixth lens 160 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the sixthlens 160 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The seventh lens 170 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the seventh lens 170. For example, the first surface of thesixth lens 170 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the sixthlens 170 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The eighth lens 180 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the eighth lens 180. For example, the first surface of theeighth lens 180 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the eighthlens 180 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The ninth lens 190 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the ninth lens 190. For example, the first surface of theninth lens 190 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the ninthlens 190 may be concave in the paraxial region and convex in the regionother than the paraxial region.

Meanwhile, each surface of the first lens 110 to the ninth lens 190 mayhave an aspherical coefficient as illustrated in Table 3. For example,the object-side surfaces and image-side surfaces of the first lens 110to the ninth lens 190 may all be the aspherical surfaces.

TABLE 3 S1 S2 S3 S4 S5 S6 Conic constant −1.0326 24.3421 24.2242 25.257418.9554 2.3100 K 4^(th) coefficient A   2.4410E−03 −3.5443E−02−4.6677E−02 −5.8967E−02 −6.4190E−02 −1.7476E−02 6^(th) coefficient B  3.1053E−02   1.2150E−01   1.7189E−01   2.4763E−01   2.5472E−01−7.8887E−03 8^(th) coefficient C −1.3452E−01 −3.8349E−01 −5.3083E−01−8.1450E−01 −9.7568E−01   2.1642E−01 10^(th) coefficient   3.6208E−01  8.3596E−01   1.1551E+00   1.9429E+00   2.7230E+00 −1.0915E+00 D12^(th) coefficient −6.3633E−01 −1.2490E+00 −1.7431E+00 −3.3100E+00−5.3540E+00   3.2672E+00 E 14^(th) coefficient   7.6380E−01   1.3198E+00  1.8649E+00   4.0527E+00   7.4915E+00 −6.5148E+00 F 16^(th) coefficient−6.4474E−01 −1.0130E+00 −1.4457E+00 −3.6075E+00 −7.5615E+00   9.0536E+00G 18^(th) coefficient   3.8905E−01   5.7331E−01   8.2268E−01  2.3519E+00   5.5511E+00 −8.9532E+00 H 20^(th) coefficient −1.6860E−01−2.4000E−01 −3.4433E−01 −1.1220E+00 −2.9633E+00   6.3386E+00 J 22^(th)coefficient   5.2051E−02   7.3536E−02   1.0487E−01   3.8707E−01  1.1374E+00 −3.1887E+00 L 24^(th) coefficient −1.1171E−02 −1.6043E−02−2.2618E−02 −9.3938E−02 −3.0557E−01   1.1126E+00 M 26^(th) coefficient  1.5839E−03   2.3600E−03   3.2738E−03   1.5202E−02   5.4506E−02−2.5593E−01 N 28^(th) coefficient −1.3335E−04 −2.0972E−04 −2.8520E−04−1.4718E−03 −5.7952E−03   3.4894E−02 0 30^(th) coefficient   5.0481E−06  8.4982E−06   1.1301E−05   6.4441E−05   2.7779E−04 −2.1355E−03 P S7 S8S9 S10 S11 S12 Conic constant 82.7021 42.8501 5.8806 −4.3158 −32.0457−83.0221 K 4^(th) coefficient A   9.9813E−03 −2.8128E−02 −5.4685E−02−3.9563E−02 −4.2872E−02 −6.2968E−02 6^(th) coefficient B −2.3849E−01  8.1781E−02   9.4803E−02   2.3972E−05   1.8417E−02   1.3082E−02 8^(th)coefficient C   1.2867E+00 −4.6043E−01 −3.5301E−01   6.5960E−02  3.2826E−04   1.4738E−02 10^(th) coefficient −4.3816E+00   1.6464E+00  9.1326E−01 −2.1373E−01 −1.1405E−02 −2.4038E−02 D 12^(th) coefficient  9.9948E+00 −3.8693E+00 −1.6528E+00   3.8519E−01   1.2238E−02  1.9188E−02 E 14^(th) coefficient −1.5879E+01   6.2268E+00   2.1410E+00−4.5707E−01 −7.7555E−03 −1.0015E−02 F 16^(th) coefficient   1.7995E+01−7.0562E+00 −2.0263E+00   3.7703E−01   3.3825E−03   3.6327E−03 G 18^(th)coefficient −1.4722E+01   5.7201E+00 1.4170E+00 −2.2129E−01 −1.0576E−03−9.3159E−04 H 20^(th) coefficient   8.7059E+00 −3.3311E+00 −7.3261E−01  9.3045E−02   2.3999E−04   1.6924E−04 J 22^(th) coefficient −3.6822E+00  1.3820E+00   2.7668E−01 −2.7824E−02 −3.9386E−05 −2.1578E−05 L 24^(th)coefficient   1.0848E+00 −3.9857E−01 −7.4170E−02   5.7771E−03  4.5706E−06   1.8850E−06 M 26^(th) coefficient −2.1121E−01   7.5918E−02  1.3353E−02 −7.9163E−04 −3.5571E−07 −1.0733E−07 N 28^(th) coefficient  2.4400E−02 −8.5853E−03 −1.4451E−03   6.4379E−05   1.6609E−08  3.5869E−09 0 30^(th) coefficient −1.2650E−03   4.3644E−04   7.0917E−05−2.3537E−06 −3.5018E−10 −5.3347E−11 P S13 S14 S15 S16 S17 S18 Conicconstant −4.3714 −31.5006 −32.6222 11.9115 −69.6098 −6.9418 K 4^(th)coefficient A −1.2461E−03   3.3135E−02   2.1339E−02   1.7467E−02−6.7992E−02 −4.5792E−02 6^(th) coefficient B −1.3615E−02 −1.2894E−02  5.5867E−03   6.1406E−03   2.3111E−02   1.5896E−02 8^(th) coefficient C  1.1855E−02   2.7413E−03 −1.1823E−02 −9.3145E−03 −4.4671E−03−4.3620E−03 10^(th) coefficient −7.0739E−03 −5.1947E−04   6.2895E−03  4.0879E−03   1.6842E−04   8.4293E−04 D 12^(th) coefficient  2.6897E−03 −5.4274E−06 −2.0035E−03 −1.0568E−03   1.5746E−04−1.0754E−04 E 14^(th) coefficient −6.8687E−04   5.3302E−05   4.3581E−04  1.8294E−04 −4.6128E−05   6.6955E−06 F 16^(th) coefficient   1.2330E−04−1.9509E−05 −6.7772E−05 −2.2175E−05   6.8275E−06   4.1532E−07 G 18^(th)coefficient −1.5912E−05   3.8231E−06   7.6909E−06   1.9153E−06−6.4176E−07 −1.4313E−07 H 20^(th) coefficient   1.4834E−06 −4.7717E−07−6.4115E−07 −1.1823E−07   4.0798E−08   1.6069E−08 J 22^(th) coefficient−9.8929E−08   3.9807E−08   3.8996E−08   5.1708E−09 −1.7825E−09−1.0577E−09 L 24^(th) coefficient   4.5969E−09 −2.2223E−09 −1.6886E−09−1.5679E−10   5.2871E−11   4.4095E−11 M 26^(th) coefficient −1.4120E−10  7.9953E−11   4.9405E−11   3.1615E−12 −1.0188E−12 −1.1477E−12 N 28^(th)coefficient   2.5750E−12 −1.6793E−12 −8.7570E−13 −3.8863E−14  1.1517E−14   1.7069E−14 0 30^(th) coefficient −2.1096E−14   1.5661E−14  7.0957E−15   2.2751E−16 −5.8018E−17 −1.1095E−16 P

In addition, the optical imaging system configured as described abovemay have aberration characteristics illustrated in FIG. 2 .

An optical imaging system 200 according to a second example embodimentof the present disclosure is described with reference to FIGS. 3 and 4 .

The optical imaging system 200 according to the second exampleembodiment of the present disclosure may include a first lens 210, asecond lens 220, a third lens 230, a fourth lens 240, a fifth lens 250,a sixth lens 260, a seventh lens 270, an eighth lens 280, and a ninthlens 290, and may further include the aperture, the filter IRCF, and theimage sensor IS.

The optical imaging system 200 according to the second exampleembodiment of the present disclosure may form the focus on an imagingplane 291. The imaging plane 291 may indicate the surface on which thefocus is formed by the optical imaging system. For example, the imagingplane 291 may indicate one surface of the image sensor IS, on whichlight is received.

Tables 4 and 5 show characteristics of each lens (e.g., radius ofcurvature, thickness of the lens or distance between the lenses,refractive index, Abbe number, and focal length).

TABLE 4 Surface Radius of Thickness or Refractive Abbe Focal no. Itemcurvature distance index no. length S1  First lens 2.736 0.913 1.54656.0 6.263 S2  12.060 0.065 S3  Second 11.750 0.296 1.546 56.0 90.480lens S4  15.278 0.062 S5  Third lens 9.526 0.240 1.677 19.2 −14.189 S6 4.734 0.460 S7  Fourth −108.003 0.309 1.546 56.0 639.761 lens S8 −82.587 0.271 S9  Fifth lens 32.856 0.375 1.667 20.4 −45.014 S10 15.6160.569 S11 Sixth lens 9.574 0.498 1.570 37.4 54.246 S12 13.603 0.552 S13Seventh 3.677 0.420 1.546 56.0 8.244 lens S14 19.242 0.090 S15 Eighth19.402 0.401 1.570 37.4 −201.979 lens S16 16.481 0.750 S17 Ninth lens6.114 0.490 1.546 56.0 −5.734 S18 2.013 0.370 S19 Filter Infinity 0.1101.518 64.2 S20 Infinity 0.790 S21 Imaging Infinity plane

TABLE 5 f 6.779 f12 5.869 FOV 76 SAG11 0.77 SA11 41.6 SA12 6.2 SA21 8SA22 2.8 SA31 15.4 SA32 28.1 SA41 9.4 SA42 15.8 SA51 39.3 SA52 32.1 SA6135.8 SA62 21.5 SA71 26.5 SA72 45.8 SA81 44.1 SA82 36.6 SA91 19.5 SA9227.9

A definition of a parameter illustrated in Table 5 is the same as in thefirst example embodiment.

1.79 is an Fno of the optical imaging system 200 according to the secondexample embodiment of the present disclosure.

In the second example embodiment of the present disclosure, the firstlens 210 may have positive refractive power, and the convex firstsurface and the concave second surface.

The second lens 220 may have positive refractive power, and the convexfirst surface and the concave second surface.

The third lens 230 may have negative refractive power, and the convexfirst surface and the concave second surface.

The fourth lens 240 may have positive refractive power, and the concavefirst surface and the convex second surface.

The fifth lens 250 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the fifth lens 250. For example, the first surface of thefifth lens 250 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the fifthlens 250 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The sixth lens 260 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the sixth lens 260. For example, the first surface of thesixth lens 260 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the sixthlens 260 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The seventh lens 270 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the seventh lens 270. For example, the first surface of theseventh lens 270 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the seventhlens 270 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The eighth lens 280 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the eighth lens 280. For example, the first surface of theeighth lens 280 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the eighthlens 280 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The ninth lens 290 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the ninth lens 290. For example, the first surface of theninth lens 290 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the ninthlens 290 may be concave in the paraxial region and convex in the regionother than the paraxial region.

Meanwhile, each surface of the first lens 210 to the ninth lens 290 mayhave an aspherical coefficient as illustrated in Table 6. For example,the object-side surfaces and image-side surfaces of the first lens 210to the ninth lens 290 may all be the aspherical surfaces.

TABLE 6 S1 S2 S3 S4 S5 S6 Conic constant −1.0245 24.0134 24.2773 23.581318.7707 2.2857 K 4^(th) coefficient A  5.1057E−03 −3.9804E−02−4.9683E−02 −5.6893E−02 −6.1480E−02 −1.4052E−02 6^(th) coefficient B 1.1882E−02  1.5784E−01  1.9988E−01  2.6147E−01  2.5590E−01 −3.4821E−028^(th) coefficient C −6.2696E−02 −5.3065E−01 −6.5238E−01 −9.6941E−01−1.0563E+00  3.7165E−01 10^(th) coefficient  1.9624E−01  1.1930E+00 1.4531E+00  2.5003E+00  3.0386E+00 −1.7536E+00 D 12^(th) coefficient−3.8023E−01 −1.8089E+00 −2.1903E+00 −4.4116E+00 −5.9512E+00  5.1830E+00E 14^(th) coefficient  4.8634E−01  1.9159E+00  2.2941E+00  5.4266E+00 8.1300E+00 −1.0261E+01 F 16^(th) coefficient −4.2788E−01 −1.4581E+00−1.7122E+00 −4.7547E+00 −7.9216E+00  1.4108E+01 G 18^(th) coefficient 2.6511E−01  8.1085E−01  9.2548E−01  3.0089E+00  5.5786E+00 −1.3737E+01H 20^(th) coefficient J −1.1674E−01 −3.3100E−01 −3.6411E−01 −1.3799E+00−2.8468E+00  9.5367E+00 22^(th) coefficient  3.6346E−02  9.8299E−02 1.0345E−01  4.5457E−01  1.0426E+00 −4.6903E+00 L 24^(th) coefficient−7.8239E−03 −2.0692E−02 −2.0703E−02 −1.0484E−01 −2.6701E−01  1.5966E+00M 26^(th) coefficient  1.1081E−03  2.9277E−03  2.7716E−03  1.6067E−02 4.5377E−02 −3.5774E−01 N 28^(th) coefficient −9.2910E−05 −2.4976E−04−2.2294E−04 −1.4690E−03 −4.5942E−03  4.7468E−02 O 30^(th) coefficient 3.4951E−06  9.7075E−06  8.1533E−06  6.0596E−05  2.0960E−04 −2.8257E−03P S7 S8 S9 S10 S11 S12 Conic constant −94.0701 94.7821 26.7287 −10.3246−26.8951 −94.9971 K 4^(th) coefficient A −3.3074E−03 −3.6137E−02−5.5841E−02 −3.8704E−02 −4.4171E−02 −6.2255E−02 6^(th) coefficient B−8.4683E−02  1.6255E−01  1.1686E−01 −1.3043E−03  2.3813E−02  1.3104E−028^(th) coefficient C  4.0123E−01 −8.1721E−01 −4.7165E−01  6.2322E−02−1.3914E−02  1.1811E−02 10^(th) coefficient −1.2199E+00  2.6167E+00 1.3034E+00 −1.8922E−01  1.0949E−02 −1.9329E−02 D 12^(th) coefficient 2.4293E+00 −5.6741E+00 −2.5302E+00  3.2205E−01 −9.8822E−03  1.5187E−02E 14^(th) coefficient −3.2654E+00  8.6222E+00  3.5198E+00 −3.6275E−01 6.8507E−03 −7.8482E−03 F 16^(th) coefficient  3.0069E+00 −9.3708E+00−3.5594E+00  2.8586E−01 −3.2915E−03  2.8371E−03 G 18^(th) coefficient−1.8848E+00  7.3617E+00  2.6344E+00 −1.6130E−01  1.0958E−03 −7.2846E−04H 20^(th) coefficient J  7.7224E−01 −4.1842E+00 −1.4240E+00  6.5554E−02−2.5419E−04  1.3281E−   33304 22^(th) coefficient −1.8102E−01 1.7027E+00  5.5490E−01 −1.9035E−02  4.0761E−05 −1.7012E−05 L 24^(th)coefficient  1.0031E−02 −4.8328E−01 −1.5154E−01  3.8520E−03 −4.4045E−06 1.4936E−06 M 26^(th) coefficient  6.6241E−03  9.0820E−02  2.7483E−02−5.1604E−04  3.0425E−07 −8.5476E−08 N 28^(th) coefficient −1.7843E−03−1.0150E−02 −2.9689E−03  4.1137E−05 −1.2055E−08  2.8707E−09 O 30^(th)coefficient  1.4758E−04  5.1056E−04  1.4440E−04 −1.4778E−06  2.0687E−10−4.2908E−11 P S13 S14 S15 S16 S17 S18 Conic constant −4.5669 −26.6451−44.4683 11.6714 −86.9396 −7.0478 K 4^(th) coefficient A −3.2257E−03 2.8825E−02  2.5617E−02  2.4347E−02 −6.1728E−02 −4.3662E−02 6^(th)coefficient B −8.4083E−03 −6.9110E−03 −2.6692E−03 −3.3064E−03 1.6583E−02  1.4745E−02 8^(th) coefficient C  6.4599E−03 −1.3811E−03−4.6629E−03 −2.8769E−03 −9.7047E−04 −4.3045E−03 10^(th) coefficient−4.0922E−03  1.1203E−03  2.7361E−03  1.5020E−03 −9.2840E−04  1.0467E−03D 12^(th) coefficient  1.6555E−03 −3.8357E−04 −8.7797E−04 −4.0840E−04 3.7310E−04 −2.1133E−04 E 14^(th) coefficient −4.4343E−04  9.7548E−05 1.9382E−04  7.8660E−05 −7.3779E−05  3.3425E−05 F 16^(th) coefficient 8.2856E−05 −1.9190E−05 −3.1149E−05 −1.1696E−05  9.1633E−06 −3.9225E−06G 18^(th) coefficient −1.1086E−05  2.8284E−06  3.7112E−06  1.3708E−06−7.6743E−07  3.3230E−07 H 20^(th) coefficient J  1.0687E−06 −3.0393E−07−3.2840E−07 −1.2497E−07  4.4473E−08 −2.0053E−08 22^(th) coefficient−7.3560E−08  2.3287E−08  2.1320E−08  8.5717E−09 −1.7862E−09  8.5016E−10L 24^(th) coefficient  3.5218E−09 −1.2348E−09 −9.8577E−10 −4.2171E−10 4.8739E−11 −2.4693E−11 M 26^(th) coefficient −1.1130E−10  4.2975E−11 3.0674E−11  1.3901E−11 −8.5996E−13  4.6765E−13 N 28^(th) coefficient 2.0856E−12 −8.8195E−13 −5.7430E−13 −2.7297E−13  8.8169E−15 −5.2054E−15O 30^(th) coefficient −1.7538E−14  8.0803E−15  4.8751E−15  2.4022E−15−3.9680E−17  2.5873E−17 P

In addition, the optical imaging system configured as described abovemay have aberration characteristics illustrated in FIG. 4 .

An optical imaging system 300 according to a third example embodiment ofthe present disclosure is described with reference to FIGS. 5 and 6 .

The optical imaging system 300 according to the third example embodimentof the present disclosure may include a first lens 310, a second lens320, a third lens 330, a fourth lens 340, a fifth lens 350, a sixth lens360, a seventh lens 370, an eighth lens 380, and a ninth lens 390, andmay further include the aperture, the filter IRCF, and the image sensorIS.

The optical imaging system 300 according to the third example embodimentof the present disclosure may form the focus on an imaging plane 391.The imaging plane 391 may indicate the surface on which the focus isformed by the optical imaging system. For example, the imaging plane 391may indicate one surface of the image sensor IS, on which light isreceived.

Tables 7 and 8 show characteristics of each lens (e.g., radius ofcurvature, thickness of the lens or distance between the lenses,refractive index, Abbe number, and focal length).

TABLE 7 Sur Radius Thick- Re- face of ness or fractive Abbe Focal no.Item curvature distance index no. length S1 First lens 2.738 0.906 1.54656.0 6.262 S2 12.118 0.067 S3 Second 11.796 0.293 1.546 56.0 92.063 lensS4 15.276 0.062 S5 Third lens 9.511 0.242 1.677 19.2 −14.349 S6 4.7560.466 S7 Fourth −80.000 0.318 1.546 56.0 −4930.697 lens S8 −82.565 0.272S9 Fifth lens 33.797 0.377 1.667 20.4 −47.527 S10 16.284 0.584 S11 Sixthlens 9.850 0.495 1.570 37.4 59.682 S12 13.607 0.541 S13 Seventh 3.6490.429 1.546 56.0 8.648 lens S14 15.376 0.091 S15 Eighth 17.000 0.4011.570 37.4 −1071.936 lens S16 16.398 0.764 S17 Ninth lens 6.093 0.4931.546 56.0 −5.796 S18 2.024 0.370 S19 Filter Infinity 0.110 1.518 64.2S20 Infinity 0.800 S21 Imaging Infinity plane

TABLE 8 f 6.85 f12 5.874 FOV 75.5 SAG11 0.77 SA11 41.7 SA12 7 SA21 8.5SA22 2.8 SA31 15.3 SA32 28 SA41 9.6 SA42 15.9 SA51 39.3 SA52 32.2 SA6136 SA62 21.3 SA71 26 SA72 46.1 SA81 44.4 SA82 35.6 SA91 19.6 SA92 28.2

A definition of a parameter illustrated in Table 8 may be the same as inthe first example embodiment.

1.81 is an Fno of the optical imaging system 300 according to the thirdexample embodiment of the present disclosure.

In the third example embodiment of the present disclosure, the firstlens 310 may have positive refractive power, and the convex firstsurface and the concave second surface.

The second lens 320 may have positive refractive power, and the convexfirst surface and the concave second surface.

The third lens 330 may have negative refractive power, and the convexfirst surface and the concave second surface.

The fourth lens 340 may have negative refractive power, and the concavefirst surface and the convex second surface.

The fifth lens 350 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the fifth lens 350. For example, the first surface of thefifth lens 350 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the fifthlens 350 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The sixth lens 360 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the sixth lens 360. For example, the first surface of thesixth lens 360 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the sixthlens 360 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The seventh lens 370 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the seventh lens 370. For example, the first surface of theseventh lens 370 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the seventhlens 370 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The eighth lens 380 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the eighth lens 380. For example, the first surface of theeighth lens 380 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the eighthlens 380 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The ninth lens 390 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the ninth lens 390. For example, the first surface of theninth lens 390 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the ninthlens 390 may be concave in the paraxial region and convex in the regionother than the paraxial region.

Meanwhile, each surface of the first lens 310 to the ninth lens 390 mayhave an aspherical coefficient as illustrated in Table 9. For example,the object-side surfaces and image-side surfaces of the first lens 310to the ninth lens 390 may all be the aspherical surfaces.

TABLE 9 S1 S2 S3 S4 S5 S6 Conic constant −1.0261 24.0358 24.2696 23.786718.8140 2.2937 K 4^(th) coefficient A  3.5273E−03 −3.7352E−02−4.7370E−02 −5.6639E−02 −6.2053E−02 −1.5064E−02 6^(th) coefficient B 2.3556E−02  1.3499E−01  1.7674E−01  2.5554E−01  2.6127E−01 −2.2176E−028^(th) coefficient C −1.0911E−01 −4.3648E−01 −5.5509E−01 −9.5008E−01−1.0931E+00  2.9211E−01 10^(th) coefficient  3.1064E−01  9.6566E−01 1.2197E+00  2.5036E+00  3.1961E+00 −1.4474E+00 D 12^(th) coefficient−5.6900E−01 −1.4482E+00 −1.8250E+00 −4.5536E+00 −6.3725E+00  4.4090E+00E 14^(th) coefficient  7.0449E−01  1.5151E+00  1.8910E+00  5.7983E+00 8.8685E+00 −8.9317E+00 F 16^(th) coefficient −6.0902E−01 −1.1349E+00−1.3843E+00 −5.2706E+00 −8.8039E+00  1.2525E+01 G 18^(th) coefficient 3.7446E−01  6.1873E−01  7.2429E−01  3.4637E+00  6.3151E+00 −1.2422E+01H 20^(th) coefficient J −1.6474E−01 −2.4671E−01 −2.7085E−01 −1.6498E+00−3.2806E+00  8.7794E+00 22^(th) coefficient  5.1487E−02  7.1389E−02 7.1339E−02  5.6408E−01  1.2221E+00 −4.3950E+00 L 24^(th) coefficient−1.1163E−02 −1.4626E−02 −1.2785E−02 −1.3485E−01 −3.1807E−01  1.5227E+00M 26^(th) coefficient  1.5961E−03  2.0155E−03  1.4570E−03  2.1385E−02 5.4875E−02 −3.4727E−01 N 28^(th) coefficient −1.3535E−04 −1.6786E−04−9.1984E−05 −2.0192E−03 −5.6344E−03  4.6898E−02 O 30^(th) coefficient 5.1550E−06  6.3950E−06  2.2641E−06  8.5837E−05  2.6042E−04 −2.8413E−03P S7 S8 S9 S10 S11 S12 Conic constant −94.9333 94.9207 25.1367 −10.4559−28.0517 −90.4260 K 4^(th) coefficient A −6.4041E−04 −3.3003E−02−5.0286E−02 −3.6111E−02 −4.2917E−02 −6.1731E−02 6^(th) coefficient B−1.1848E−01  1.3050E−01  6.7929E−02 −1.9900E−02  1.8066E−02  1.0382E−028^(th) coefficient C  6.1908E−01 −6.5755E−01 −2.4983E−01  1.2951E−01−1.0780E−03  1.7225E−02 10^(th) coefficient −2.0863E+00  2.1115E+00 6.6171E−01 −3.4274E−01 −6.1903E−03 −2.5116E−02 D 12^(th) coefficient 4.7123E+00 −4.5779E+00 −1.2617E+00  5.6026E−01  5.1227E−03  1.9175E−02E 14^(th) coefficient −7.4076E+00  6.9373E+00  1.7477E+00 −6.2266E−01−2.2023E−03 −9.7561E−03 F 16^(th) coefficient  8.3060E+00 −7.5064E+00−1.7765E+00  4.8921E−01  5.7315E−04  3.4881E−03 G 18^(th) coefficient−6.7271E+00  5.8661E+00  1.3311E+00 −2.7647E−01 −8.6200E−05 −8.8802E−04H 20^(th) coefficient J  3.9413E+00 −3.3157E+00 −7.3228E−01  1.1278E−01 5.3489E−06  1.6083E−04 22^(th) coefficient −1.6530E+00  1.3420E+00 2.9144E−01 −3.2899E−02 2.3671E−07 −2.0496E−05 L 24^(th) coefficient 4.8338E−01 −3.7900E−01 −8.1454E−02  6.6904E−03 −1.6017E−08  1.7921E−06M 26^(th) coefficient −9.3497E−02  7.0906E−02  1.5131E−02 −9.0064E−04−8.9000E−09 −1.0222E−07 N 28^(th) coefficient  1.0738E−02 −7.8950E−03−1.6740E−03  7.2116E−05  1.1825E−09  3.4237E−09 O 30^(th) coefficient−5.5370E−04  3.9595E−04  8.3330E−05 −2.6002E−06 −4.4183E−11 −5.1052E−11P S13 S14 S15 S16 S17 S18 Conic constant −4.4840 −4.4840 −43.808711.8383 −84.4472 −7.0202 K 4^(th) coefficient A −3.9789E−04 −3.9789E−04 2.4620E−02  2.2025E−02 −6.4438E−02 −4.6207E−02 6^(th) coefficient B−1.5356E−02 −1.5356E−02  7.5862E−05  1.4561E−04  1.8902E−02  1.6573E−028^(th) coefficient C  1.3532E−02  1.3532E−02 −7.4388E−03 −5.3103E−03−2.1174E−03 −5.0721E−03 10^(th) coefficient −8.0102E−03 −8.0102E−03 4.2588E−03  2.4698E−03 −5.8896E−04  1.2336E−03 D 12^(th) coefficient 3.0265E−03  3.0265E−03 −1.4035E−03 −6.4007E−04  3.1123E−04 −2.3537E−04E 14^(th) coefficient −7.6927E−04 −7.6927E−04  3.1629E−04  1.1225E−04−6.6722E−05  3.3886E−05 F 16^(th) coefficient  1.3745E−04  1.3745E−04−5.1172E−05 −1.4269E−05  8.6788E−06 −3.5345E−06 G 18^(th) coefficient−1.7642E−05 −1.7642E−05  6.0524E−06  1.3660E−06 −7.5193E−07  2.5879E−07H 20^(th) coefficient J  1.6349E−06  1.6349E−06 −5.2536E−07 −1.0088E−07 4.4832E−08 −1.2844E−08 22^(th) coefficient −1.0835E−07 −1.0835E−07 3.3158E−08  5.7762E−09 −1.8479E−09  4.0534E−10 L 24^(th) coefficient 5.0022E−09  5.0022E−09 −1.4823E−09 −2.4984E−10  5.1705E−11 −6.8373E−12M 26^(th) coefficient −1.5268E−10 −1.5268E−10  4.4491E−11  7.6286E−12−9.3594E−13  1.3529E−14 N 28^(th) coefficient  2.7673E−12  2.7673E−12−8.0387E−13 −1.4441E−13  9.8614E−15  1.4568E−15 O 30^(th) coefficient−2.2540E−14 −2.2540E−14  6.6008E−15  1.2564E−15 −4.5759E−17 −1.7133E−17P

In addition, the optical imaging system configured as described abovemay have aberration characteristics illustrated in FIG. 6 .

An optical imaging system 400 according to a fourth example embodimentof the present disclosure is described with reference to FIGS. 7 and 8 .

The optical imaging system 400 according to the fourth exampleembodiment of the present disclosure may include a first lens 410, asecond lens 420, a third lens 430, a fourth lens 440, a fifth lens 450,a sixth lens 460, a seventh lens 470, an eighth lens 480, and a ninthlens 490, and may further include the aperture, the filter IRCF, and theimage sensor IS.

The optical imaging system 400 according to the fourth exampleembodiment of the present disclosure may form the focus on an imagingplane 491. The imaging plane 491 may indicate the surface on which thefocus is formed by the optical imaging system. For example, the imagingplane 491 may indicate one surface of the image sensor IS, on whichlight is received.

Tables 10 and 11 show characteristics of each lens (e.g., radius ofcurvature, thickness of the lens or distance between the lenses,refractive index, Abbe number, and focal length).

TABLE 10 Sur- Radius Thick- Re- face of ness or fractive Abbe Focal no.Item curvature distance index no. length S1 First lens 2.736 0.904 1.54656.0 6.261 S2 12.080 0.066 S3 Second 11.749 0.293 1.546 56.0 93.827 lensS4 15.110 0.063 S5 Third lens 9.422 0.242 1.677 19.2 −14.353 S6 4.7340.465 S7 Fourth −68.855 0.310 1.546 56.0 721.559 lens S8 −58.708 0.274S9 Fifth lens 50.719 0.400 1.667 20.4 −45.039 S10 18.805 0.590 S11 Sixthlens 10.245 0.492 1.570 37.4 60.013 S12 14.366 0.529 S13 Seventh 3.6140.435 1.546 56.0 8.904 lens S14 13.462 0.101 S15 Eighth 17.000 0.3991.570 37.4 −897.221 lens S16 16.313 0.772 S17 Ninth lens 5.898 0.5011.546 56.0 −5.869 S18 2.015 0.370 S19 Filter Infinity 0.110 1.518 64.2S20 Infinity 0.792 S21 Imaging Infinity plane

TABLE 11 f 6.878 f12 5.879 FOV 75.2 SAG11 0.77 SA11 41.8 SA12 7.6 SA218.8 SA22 3 SA31 15.9 SA32 28.1 SA41 9.7 SA42 16.7 SA51 39.6 SA52 32.8SA61 36.2 SA62 21.3 SA71 25.8 SA72 46.6 SA81 44.5 SA82 34.1 SA91 19.4SA92 28.1

A definition of a parameter illustrated in Table 11 may be the same asin the first example embodiment.

1.83 is an Fno of the optical imaging system 400 according to the fourthexample embodiment of the present disclosure.

In the fourth example embodiment of the present disclosure, the firstlens 410 may have positive refractive power, and the convex firstsurface and the concave second surface.

The second lens 420 may have positive refractive power, and the convexfirst surface and the concave second surface.

The third lens 430 may have negative refractive power, and the convexfirst surface and the concave second surface.

The fourth lens 440 may have positive refractive power, and the concavefirst surface and the convex second surface.

The fifth lens 450 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the fifth lens 450. For example, the first surface of thefifth lens 450 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the fifthlens 450 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The sixth lens 460 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the sixth lens 460. For example, the first surface of thesixth lens 460 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the sixthlens 460 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The seventh lens 470 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the seventh lens 470. For example, the first surface of theseventh lens 470 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the seventhlens 470 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The eighth lens 480 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the eighth lens 480. For example, the first surface of theeighth lens 480 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the eighthlens 480 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The ninth lens 490 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the ninth lens 490. For example, the first surface of theninth lens 490 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the ninthlens 490 may be concave in the paraxial region and convex in the regionother than the paraxial region.

Meanwhile, each surface of the first lens 410 to the ninth lens 490 mayhave an aspherical coefficient as illustrated in Table 12. For example,the object-side surfaces and image-side surfaces of the first lens 410to the ninth lens 490 may all be the aspherical surfaces.

TABLE 12 S1 S2 S3 S4 S5 S6 Conic constant −1.0262 23.9968 24.165624.0710 18.8908 2.2980 K 4^(th) coefficient A  3.1733E−03 −3.7509E−02−4.6982E−02 −5.5187E−02 −6.0381E−02 −1.3740E−02 6^(th) coefficient B 2.5836E−02  1.3285E−01  1.6979E−01  2.2870E−01  2.3011E−01 −4.2895E−028^(th) coefficient C −1.1583E−01 −4.1698E−01 −5.0926E−01 −7.8043E−01−9.0417E−01  4.1216E−01 10^(th) coefficient  3.2161E−01  9.0276E−01 1.0756E+00  1.9469E+00  2.5915E+00 −1.8327E+00 D 12^(th) coefficient−5.7865E−01 −1.3391E+00 −1.5644E+00 −3.4400E+00 −5.1796E+00  5.1999E+00E 14^(th) coefficient  7.0716E−01  1.3997E+00  1.5925E+00  4.3259E+00 7.3102E+00 −1.0049E+01 F 16^(th) coefficient −6.0544E−01 −1.0569E+00−1.1565E+00 −3.9249E+00 −7.4075E+00  1.3662E+01 G 18^(th) coefficient 3.6957E−01  5.8531E−01  6.0610E−01  2.5938E+00  5.4447E+00 −1.3286E+01H 20^(th) coefficient J −1.6171E−01 −2.3857E−01 −2.2937E−01 −1.2492E+00−2.9055E+00  9.2813E+00 22^(th) coefficient  5.0345E−02  7.0899E−02 6.1876E−02  4.3359E−01  1.1136E+00 −4.6187E+00 L 24^(th) coefficient−1.0886E−02 −1.4964E−02 −1.1532E−02 −1.0554E−01 −2.9847E−01  1.5974E+00M 26^(th) coefficient  1.5540E−03  2.1270E−03  1.3974E−03  1.7075E−02 5.3062E−02 −3.6484E−01 N 28^(th) coefficient −1.3167E−04 −1.8268E−04−9.7558E−05 −1.6472E−03 −5.6167E−03  4.9458E−02 O 30^(th) coefficient 5.0149E−06  7.1653E−06  2.8995E−06  7.1607E−05  2.6772E−04 −3.0132E−03P S7 S8 S9 S10 S11 S12 Conic constant −94.9530 94.9983 24.0590 −8.4366−29.5969 −85.9421 K 4^(th) coefficient A  6.4629E−04 −2.8643E−02−5.1567E−02 −3.9980E−02 −4.3786E−02 −6.3611E−02 6^(th) coefficient B−1.3243E−01  8.7551E−02  7.6859E−02  6.5019E−03  2.3434E−02  1.6891E−028^(th) coefficient C  6.8170E−01 −4.5513E−01 −2.9234E−01  3.2143E−02−1.2010E−02  7.3425E−03 10^(th) coefficient −2.2469E+00  1.5180E+00 7.8933E−01 −1.1944E−01  6.0085E−03 −1.6323E−02 D 12^(th) coefficient 4.9716E+00 −3.4000E+00 −1.5094E+00  2.1950E−01 −3.4973E−03  1.4113E−02E 14^(th) coefficient −7.6714E+00  5.2941E+00  2.0753E+00 −2.6068E−01 1.8930E−03 −7.7676E−03 F 16^(th) coefficient  8.4553E+00 −5.8618E+00−2.0822E+00  2.1437E−01 −7.6924E−04  2.9383E−03 G 18^(th) coefficient−6.7375E+00  4.6740E+00  1.5356E+00 −1.2539E−01  2.1796E−04 −7.7928E−04H 20^(th) coefficient J  3.8859E+00 −2.6901E+00 −8.3074E−01  5.2581E−02−4.1083E−05  1.4538E−04 22^(th) coefficient −1.6048E+00  1.1071E+00 3.2524E−01 −1.5698E−02  4.6508E−06 −1.8931E−05 L 24^(th) coefficient 4.6210E−01 −3.1759E−01 −8.9525E−02  3.2584E−03 −2.1333E−07  1.6819E−06M 26^(th) coefficient −8.7981E−02  6.0312E−02  1.6404E−02 −4.4698E−04−1.3474E−08 −9.7089E−08 N 28^(th) coefficient  9.9391E−03 −6.8130E−03−1.7935E−03  3.6448E−05  2.1196E−09  3.2815E−09 O 30^(th) coefficient−5.0356E−04  3.4651E−04  8.8379E−05 −1.3384E−06 −7.5357E−11 −4.9274E−11P S13 S14 S15 S16 S17 S18 Conic constant −4.3972 −34.2590 −41.524011.8947 −78.8490 −6.9928 K 4^(th) coefficient A −1.2615E−03  3.1729E−02 2.2537E−02  1.9336E−02 −6.5175E−02 −4.6283E−02 6^(th) coefficient B−1.3072E−02 −1.0923E−02  4.2700E−03  4.0691E−03  2.0173E−02  1.6971E−028^(th) coefficient C  1.1117E−02  1.1724E−03 −1.1114E−02 −8.1301E−03−2.9348E−03 −5.3368E−03 10^(th) coefficient −6.6042E−03  2.9113E−04 6.0795E−03  3.6720E−03 −3.1139E−04  1.3145E−03 D 12^(th) coefficient 2.5101E−03 −2.8258E−04 −1.9749E−03 −9.6770E−04  2.5507E−04 −2.4743E−04E 14^(th) coefficient −6.4136E−04  1.1804E−04  4.3707E−04  1.7212E−04−5.9633E−05  3.4236E−05 F 16^(th) coefficient  1.1529E−04 −3.0089E−05−6.8954E−05 −2.1774E−05  8.1302E−06 −3.3457E−06 G 18^(th) coefficient−1.4908E−05  5.0453E−06  7.9088E−06  2.0093E−06 −7.3012E−07  2.2128E−07H 20^(th) coefficient J  1.3933E−06 −5.7643E−07 −6.6339E−07 −1.3703E−07 4.4979E−08 −9.1630E−09 22^(th) coefficient −9.3178E−08  4.5340E−08 4.0404E−08  6.9280E−09 −1.9168E−09  1.8223E−10 L 24^(th) coefficient 4.3417E−09 −2.4229E−09 −1.7442E−09 −2.5641E−10  5.5620E−11  1.8734E−12M 26^(th) coefficient −1.3372E−10  8.4164E−11  5.0681E−11  6.6570E−12−1.0496E−12 −2.0075E−13 N 28^(th) coefficient  2.4447E−12 −1.7159E−12−8.8985E−13 −1.0901E−13  1.1616E−14  4.4890E−15 O 30^(th) coefficient−2.0075E−14  1.5588E−14  7.1327E−15  8.4526E−16 −5.7216E−17 −3.5996E−17P

In addition, the optical imaging system configured as described abovemay have aberration characteristics illustrated in FIG. 8 .

An optical imaging system 500 according to a fifth example embodiment ofthe present disclosure is described with reference to FIGS. 9 and 10 .

The optical imaging system 500 according to the fifth example embodimentof the present disclosure may include a first lens 510, a second lens520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens560, a seventh lens 570, an eighth lens 580, and a ninth lens 590, andmay further include the aperture, the filter IRCF, and the image sensorIS.

The optical imaging system 500 according to the fifth example embodimentof the present disclosure may form the focus on an imaging plane 591.The imaging plane 591 may indicate the surface on which the focus isformed by the optical imaging system. For example, the imaging plane 591may indicate one surface of the image sensor IS, on which light isreceived.

Tables 13 and 14 show characteristics of each lens (e.g., radius ofcurvature, thickness of the lens or distance between the lenses,refractive index, Abbe number, and focal length).

TABLE 13 Sur- Radius Thick- Re- face of ness or fractive Abbe Focal no.Item curvature distance index no. length S1 First lens 2.733 0.930 1.54656.0 6.209 S2 12.395 0.066 S3 Second 12.018 0.280 1.546 56.0 125.456lens S4 14.454 0.053 S5 Third lens 9.129 0.260 1.687 18.4 −14.898 S64.769 0.467 S7 Fourth −54.759 0.333 1.546 56.0 3022.289 lens S8 −53.1140.276 S9 Fifth lens 58.921 0.400 1.667 20.4 −50.003 S10 21.238 0.589 S11Sixth lens 11.220 0.493 1.570 37.4 69.830 S12 15.372 0.516 S13 Seventh3.613 0.446 1.546 56.0 8.938 lens S14 13.295 0.090 S15 Eighth 17.0000.380 1.570 37.4 −886.026 lens S16 16.313 0.766 S17 Ninth lens 6.0300.501 1.546 56.0 −5.865 S18 2.031 0.370 S19 Filter Infinity 0.110 1.51864.2 S20 Infinity 0.790 S21 Imaging Infinity plane

TABLE 14 f 6.892 f12 5.914 FOV 75.1 SAG11 0.769 SA11 41.5 SA12 6.2 SA218.4 SA22 3.5 SA31 17 SA32 27.9 SA41 10.1 SA42 16.9 SA51 39.9 SA52 33.1SA61 36.5 SA62 21.4 SA71 25.8 SA72 46.9 SA81 44.4 SA82 33.3 SA91 19.2SA92 28.1

A definition of a parameter illustrated in Table 14 may be the same asin the first example embodiment.

1.81 is an Fno of the optical imaging system 500 according to the fifthexample embodiment of the present disclosure.

In the fifth example embodiment of the present disclosure, the firstlens 510 may have positive refractive power, and the convex firstsurface and the concave second surface.

The second lens 520 may have positive refractive power, and the convexfirst surface and the concave second surface.

The third lens 530 may have negative refractive power, and the convexfirst surface and the concave second surface.

The fourth lens 540 may have positive refractive power, and the concavefirst surface and the convex second surface.

The fifth lens 550 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the fifth lens 550. For example, the first surface of thefifth lens 550 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the fifthlens 550 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The sixth lens 560 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the sixth lens 560. For example, the first surface of thesixth lens 560 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the sixthlens 560 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The seventh lens 570 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the seventh lens 570. For example, the first surface of theseventh lens 570 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the seventhlens 570 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The eighth lens 580 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the eighth lens 580. For example, the first surface of theeighth lens 580 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the eighthlens 580 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The ninth lens 590 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the ninth lens 590. For example, the first surface of theninth lens 590 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the ninthlens 590 may be concave in the paraxial region and convex in the regionother than the paraxial region.

Meanwhile, each surface of the first lens 510 to the ninth lens 590 mayhave an aspherical coefficient as illustrated in Table 15. For example,the object-side surfaces and image-side surfaces of the first lens 510to the ninth lens 590 may all be the aspherical surfaces.

TABLE 15 S1 S2 S3 S4 S5 S6 Conic constant −1.0325 24.3947 24.262625.1850 18.9501 2.3038 K 4^(th) coefficient A  2.2300E−03 −3.4135E−02−4.6070E−02 −5.7811E−02 −6.4938E−02 −1.9434E−02 6^(th) coefficient B 3.0549E−02  1.1122E−01  1.7099E−01  2.4464E−01  2.7175E−01  2.8396E−028^(th) coefficient C −1.2573E−01 −3.5016E−01 −5.5149E−01 −8.3880E−01−1.1009E+00 −4.2830E−02 10^(th) coefficient  3.2605E−01  7.8027E−01 1.2721E+00  2.1110E+00  3.2168E+00 −4.2112E−02 D 12^(th) coefficient−5.5696E−01 −1.2034E+00 −2.0445E+00 −3.7901E+00 −6.5718E+00  5.4412E−01E 14^(th) coefficient  6.5353E−01  1.3193E+00  2.3326E+00  4.8662E+00 9.5075E+00 −1.7135E+00 F 16^(th) coefficient −5.4129E−01 −1.0535E+00−1.9271E+00 −4.5170E+00 −9.8906E+00  3.1159E+00 G 18^(th) coefficient 3.2128E−01  6.2085E−01  1.1660E+00  3.0543E+00  7.4676E+00 −3.7199E+00H 20^(th) coefficient J −1.3718E−01 −2.7036E−01 −5.1703E−01 −1.5037E+00−4.0936E+00  3.0408E+00 22^(th) coefficient  4.1782E−02  8.5941E−02 1.6605E−01  5.3284E−01  1.6117E+00 −1.7173E+00 L 24^(th) coefficient−8.8554E−03 −1.9378E−02 −3.7571E−02 −1.3228E−01 −4.4379E−01  6.5994E−01M 26^(th) coefficient  1.2408E−03  2.9331E−03  5.6752E−03  2.1815E−02 8.1092E−02 −1.6490E−01 N 28^(th) coefficient −1.0331E−04 −2.6699E−04−5.1338E−04 −2.1452E−03 −8.8294E−03  2.4171E−02 O 30^(th) coefficient 3.8703E−06  1.1034E−05  2.1023E−05  9.5115E−05  4.3338E−04 −1.5778E−03P S7 S8 S9 S10 S11 S12 Conic constant 94.9813 24.4712 1.6345 −5.5726−31.7127 −81.9689 K 4^(th) coefficient A  1.2524E−02 −2.4046E−02−5.2085E−02 −4.0243E−02 −4.2807E−02 −6.3118E−02 6^(th) coefficient B−2.5625E−01  4.5331E−02  7.4109E−02  6.6385E−03  1.8965E−02  1.3843E−028^(th) coefficient C  1.3553E+00 −2.7933E−01 −2.6809E−01  3.4328E−02−2.2576E−03  1.2763E−02 10^(th) coefficient −4.5690E+00  1.0574E+00 6.9128E−01 −1.2836E−01 −6.9689E−03 −2.1571E−02 D 12^(th) coefficient 1.0399E+01 −2.5593E+00 −1.2584E+00  2.3915E−01  7.9937E−03  1.7401E−02E 14^(th) coefficient −1.6585E+01  4.1820E+00  1.6471E+00 −2.8820E−01−5.1646E−03 −9.1851E−03 F 16^(th) coefficient  1.8962E+01 −4.7772E+00−1.5795E+00  2.4030E−01  2.3074E−03  3.3712E−03 G 18^(th) coefficient−1.5715E+01  3.8899E+00  1.1210E+00 −1.4233E−01 −7.4495E−04 −8.7419E−04H 20^(th) coefficient J  9.4481E+00 −2.2719E+00 −5.8872E−01  6.0363E−02 1.7552E−04  1.6035E−04 22^(th) coefficient −4.0756E+00  9.4504E−01 2.2581E−01 −1.8205E−02 −3.0008E−05 −2.0613E−05 L 24^(th) coefficient 1.2283E+00 −2.7336E−01 −6.1431E−02  3.8129E−03  3.6301E−06  1.8131E−06M 26^(th) coefficient −2.4531E−01  5.2268E−02  1.1211E−02 −5.2717E−04−2.9391E−07 −1.0384E−07 N 28^(th) coefficient  2.9150E−02 −5.9400E−03−1.2285E−03  4.3272E−05  1.4216E−08  3.4869E−09 O 30^(th) coefficient−1.5588E−03  3.0384E−04  6.0961E−05 −1.5975E−06 −3.0890E−10 −5.2076E−11P S13 S14 S15 S16 S17 S18 Conic constant −4.4171 −29.8505 −36.365611.9405 −72.7544 −6.9289 K 4^(th) coefficient A −1.2227E−03  3.2850E−02 2.2232E−02  1.8544E−02 −6.7022E−02 −4.6181E−02 6^(th) coefficient B−1.3550E−02 −1.2847E−02  4.0171E−03  4.5859E−03  2.1490E−02  1.6261E−028^(th) coefficient C  1.1748E−02  2.9903E−03 −1.0498E−02 −8.2105E−03−3.3579E−03 −4.6436E−03 10^(th) coefficient −6.9950E−03 −7.6597E−04 5.6294E−03  3.6185E−03 −2.5014E−04  9.8300E−04 D 12^(th) coefficient 2.6562E−03  1.1421E−04 −1.7926E−03 −9.2803E−04  2.5597E−04 −1.5069E−04E 14^(th) coefficient −6.7782E−04  1.7229E−05  3.9028E−04  1.5890E−04−6.1592E−05  1.5360E−05 F 16^(th) coefficient  1.2165E−04 −1.2182E−05−6.0922E−05 −1.9035E−05  8.5092E−06 −7.7197E−07 G 18^(th) coefficient−1.5701E−05  2.7824E−06  6.9617E−06  1.6249E−06 −7.7092E−07 −2.8932E−08H 20^(th) coefficient J  1.4642E−06 −3.7221E−07 −5.8612E−07 −9.9364E−08 4.7836E−08  8.2719E−09 22^(th) coefficient −9.7700E−08  3.2305E−08 3.6086E−08  4.3366E−09 −2.0520E−09 −6.8138E−10 L 24^(th) coefficient 4.5422E−09 −1.8501E−09 −1.5841E−09 −1.3348E−10  5.9929E−11  3.1542E−11M 26^(th) coefficient −1.3959E−10  6.7749E−11  4.7003E−11  2.8221E−12−1.1383E−12 −8.7237E−13 N 28^(th) coefficient  2.5468E−12 −1.4412E−12−8.4442E−13 −3.8191E−14  1.2684E−14  1.3496E−14 O 30^(th) coefficient−2.0873E−14  1.3567E−14  6.9264E−15  2.5863E−16 −6.2923E−17 −9.0175E−17P

In addition, the optical imaging system configured as described abovemay have aberration characteristics illustrated in FIG. 10 .

An optical imaging system 600 according to a sixth example embodiment ofthe present disclosure is described with reference to FIGS. 11 and 12 .

The optical imaging system 600 according to the sixth example embodimentof the present disclosure may include a first lens 610, a second lens620, a third lens 630, a fourth lens 640, a fifth lens 650, a sixth lens660, a seventh lens 670, an eighth lens 680, and a ninth lens 690, andmay further include the aperture, the filter IRCF, and the image sensorIS.

The optical imaging system 600 according to the sixth example embodimentof the present disclosure may form the focus on an imaging plane 691.The imaging plane 691 may indicate the surface on which the focus isformed by the optical imaging system. For example, the imaging plane 691may indicate one surface of the image sensor IS, on which light isreceived.

Tables 16 and 17 show characteristics of each lens (e.g., radius ofcurvature, thickness of the lens or distance between the lenses,refractive index, Abbe number, and focal length).

TABLE 16 Sur- Radius Thick- Re- face of ness or fractive Abbe Focal no.Item curvature distance index no. length S1 First lens 2.738 0.914 1.54656.0 6.202 S2 12.250 0.066 S3 Second 11.925 0.294 1.546 56.0 129.516lens S4 15.278 0.062 S5 Third lens 9.520 0.242 1.677 19.2 −14.934 S64.747 0.460 S7 Fourth −80.000 0.307 1.546 56.0 −933.596 lens S8 −82.5650.270 S9 Fifth lens 33.511 0.379 1.667 20.4 −51.789 S10 15.957 0.577 S11Sixth lens 9.556 0.494 1.570 37.4 70.584 S12 12.984 0.543 S13 Seventh3.650 0.423 1.546 56.0 8.946 lens S14 15.738 0.090 S15 Eighth 15.9250.403 1.570 37.4 −886.213 lens S16 16.398 0.764 S17 Ninth lens 6.1950.494 1.546 56.0 −5.912 S18 2.020 0.370 S19 Filter Infinity 0.110 1.51864.2 S20 Infinity 0.808 S21 Imaging Infinity plane

TABLE 17 f 6.897 f12 5.915 FOV 75.1 SAG11 0.77 SA11 41.6 SA12 5.9 SA217.7 SA22 2.8 SA31 15.3 SA32 28.1 SA41 9.7 SA42 15.9 SA51 39.3 SA52 32.2SA61 35.8 SA62 21.4 SA71 26.1 SA72 46.2 SA81 44.5 SA82 35.7 SA91 19.7SA92 28.2

A definition of a parameter illustrated in Table 17 may be the same asin the first example embodiment.

1.80 is an Fno of the optical imaging system 600 according to the sixthexample embodiment of the present disclosure.

In the sixth example embodiment of the present disclosure, the firstlens 610 may have positive refractive power, and the convex firstsurface and the concave second surface.

The second lens 620 may have positive refractive power, and the convexfirst surface and the concave second surface.

The third lens 630 may have negative refractive power, and the convexfirst surface and the concave second surface.

The fourth lens 640 may have negative refractive power, and the concavefirst surface and the convex second surface.

The fifth lens 650 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the fifth lens 650. For example, the first surface of thefifth lens 650 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the fifthlens 650 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The sixth lens 660 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the sixth lens 660. For example, the first surface of thesixth lens 660 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the sixthlens 660 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The seventh lens 670 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the seventh lens 670. For example, the first surface of theseventh lens 670 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the seventhlens 670 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The eighth lens 680 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the eighth lens 680. For example, the first surface of theeighth lens 680 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the eighthlens 680 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The ninth lens 690 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the ninth lens 690. For example, the first surface of theninth lens 690 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the ninthlens 690 may be concave in the paraxial region and convex in the regionother than the paraxial region.

Meanwhile, each surface of the first lens 610 to the ninth lens 690 mayhave an aspherical coefficient as illustrated in Table 18. For example,the object-side surfaces and image-side surfaces of the first lens 610to the ninth lens 690 may all be the aspherical surfaces.

TABLE 18 S1 S2 S3 S4 S5 S6 Conic constant −1.0257 24.0094 24.285023.6839 18.7850 2.2909 K 4^(th) coefficient A  3.9071E−03 −3.9125E−02−5.0208E−02 −5.8730E−02 −6.1362E−02 −1.4019E−02 6^(th) coefficient B 1.8217E−02  1.5393E−01  2.0735E−01  2.7911E−01  2.5405E−01 −3.3837E−028^(th) coefficient C −8.1757E−02 −5.2265E−01 −6.9820E−01 −1.0643E+00−1.0456E+00  3.5698E−01 10^(th) coefficient  2.3269E−01  1.1932E+00 1.6102E+00  2.8227E+00  3.0037E+00 −1.6672E+00 D 12^(th) coefficient−4.2765E−01 −1.8412E+00 −2.5239E+00 −5.1320E+00 −5.8773E+00  4.8984E+00E 14^(th) coefficient  5.3039E−01  1.9860E+00  2.7606E+00  6.5225E+00 8.0221E+00 −9.6720E+00 F 16^(th) coefficient −4.5819E−01 −1.5386E+00−2.1597E+00 −5.9190E+00 −7.8082E+00  1.3294E+01 G 18^(th) coefficient 2.8093E−01  8.6972E−01  1.2268E+00  3.8862E+00  5.4911E+00 −1.2965E+01H 20^(th) coefficient J −1.2305E−01 −3.6005E−01 −5.0779E−01 −1.8512E+00−2.7970E+00  9.0286E+00 22^(th) coefficient  3.8251E−02  1.0814E−01 1.5173E−01  6.3366E−01  1.0219E+00 −4.4590E+00 L 24^(th) coefficient−8.2426E−03 −2.2954E−02 −3.1889E−02 −1.5186E−01 −2.6087E−01  1.5255E+00M 26^(th) coefficient  1.1709E−03  3.2658E−03  4.4721E−03  2.4174E−02 4.4154E−02 −3.4377E−01 N 28^(th) coefficient −9.8629E−05 −2.7950E−04−3.7563E−04 −2.2949E−03 −4.4479E−03  4.5898E−02 O 30^(th) coefficient 3.7314E−06  1.0878E−05  1.4293E−05  9.8257E−05  2.0166E−04 −2.7503E−03P S7 S8 S9 S10 S11 S12 Conic constant −63.4092 94.1802 28.4250 −10.9947−27.1098 −93.0928 K 4^(th) coefficient A −2.7887E−03 −3.2706E−02−4.9260E−02 −3.6167E−02 −4.3209E−02 −6.1793E−02 6^(th) coefficient B−8.8393E−02  1.3041E−01  6.1985E−02 −1.9189E−02  1.7960E−02  9.6713E−038^(th) coefficient C  4.1885E−01 −6.6383E−01 −2.3219E−01  1.2615E−01 7.3668E−05  1.8703E−02 10^(th) coefficient −1.2908E+00  2.1495E+00 6.3639E−01 −3.3258E−01 −7.9463E−03 −2.6585E−02 D 12^(th) coefficient 2.6488E+00 −4.7054E+00 −1.2632E+00  5.3978E−01  6.6032E−03  2.0073E−02E 14^(th) coefficient −3.7418E+00  7.2087E+00  1.8180E+00 −5.9527E−01−3.0348E−03 −1.0127E−02 F 16^(th) coefficient  3.7205E+00 −7.8900E+00−1.9091E+00  4.6443E−01  9.0868E−04  3.5970E−03 G 18^(th) coefficient−2.6282E+00  6.2370E+00  1.4678E+00 −2.6095E−01 −1.8587E−04 −9.1141E−04H 20^(th) coefficient J  1.3143E+00 −3.5649E+00 −8.2313E−01  1.0596E−01 2.7205E−05  1.6454E−04 22^(th) coefficient −4.5660E−01  1.4582E+00 3.3209E−01 −3.0805E−02 −3.2417E−06 −2.0923E−05 L 24^(th) coefficient 1.0571E−01 −4.1593E−01 −9.3673E−02  6.2488E−03  3.7239E−07  1.8271E−06M 26^(th) coefficient −1.5004E−02  7.8528E−02  1.7501E−02 −8.3966E−04−3.7603E−08 −1.0415E−07 N 28^(th) coefficient  1.0838E−03 −8.8161E−03−1.9427E−03  6.7145E−05  2.4384E−09  3.4874E−09 O 30^(th) coefficient−2.1695E−05  4.4541E−04  9.6852E−05 −2.4188E−06 −6.8747E−11 −5.2005E−11P S13 S14 S15 S16 S17 S18 Conic constant −4.4968 −30.1698 −49.954511.9430 −86.8829 −7.1036 K 4^(th) coefficient A −9.6582E−04  3.1348E−02 2.5298E−02  2.3795E−02 −6.3599E−02 −4.4999E−02 6^(th) coefficient B−1.4153E−02 −1.1918E−02 −1.5433E−03 −2.8803E−03  1.7576E−02  1.5569E−028^(th) coefficient C  1.2345E−02  2.7361E−03 −5.8790E−03 −2.8503E−03−1.2609E−03 −4.6655E−03 10^(th) coefficient −7.3534E−03 −7.2702E−04 3.4365E−03  1.3201E−03 −8.9753E−04  1.1515E−03 D 12^(th) coefficient 2.7934E−03  1.1648E−04 −1.1325E−03 −2.9795E−04  3.8085E−04 −2.3186E−04E 14^(th) coefficient −7.1285E−04  1.3803E−05  2.5650E−04  4.3051E−05−7.7172E−05  3.6111E−05 F 16^(th) coefficient  1.2784E−04 −1.1113E−05−4.2002E−05 −4.3892E−06  9.7580E−06 −4.1404E−06 G 18^(th) coefficient−1.6478E−05  2.5826E−06  5.0576E−06  3.5203E−07 −8.2980E−07  3.4032E−07H 20^(th) coefficient J  1.5342E−06 −3.4670E−07 −4.4873E−07 −2.5894E−08 4.8753E−08 −1.9740E−08 22^(th) coefficient −1.0219E−07  3.0015E−08 2.9009E−08  1.8303E−09 −1.9831E−09  7.9348E−10 L 24^(th) coefficient 4.7440E−09 −1.7077E−09 −1.3288E−09 −1.0661E−10  5.4753E−11 −2.1413E−11M 26^(th) coefficient −1.4562E−10  6.1940E−11  4.0826E−11  4.2519E−12−9.7660E−13  3.6541E−13 N 28^(th) coefficient  2.6547E−12 −1.3018E−12−7.5349E−13 −9.8551E−14  1.0110E−14 −3.4928E−15 O 30^(th) coefficient−2.1749E−14  1.2084E−14  6.3036E−15  9.9092E−16 −4.5878E−17  1.3736E−17P

In addition, the optical imaging system configured as described abovemay have aberration characteristics as illustrated in FIG. 12 .

An optical imaging system 700 according to a seventh example embodimentof the present disclosure is described with reference to FIGS. 13 and 14.

The optical imaging system 700 according to the seventh exampleembodiment of the present disclosure may include a first lens 710, asecond lens 720, a third lens 730, a fourth lens 740, a fifth lens 750,a sixth lens 760, a seventh lens 770, an eighth lens 780, and a ninthlens 790, and may further include the aperture, the filter IRCF, and theimage sensor IS.

The optical imaging system 700 according to the seventh exampleembodiment of the present disclosure may form the focus on an imagingplane 791. The imaging plane 791 may indicate the surface on which thefocus is formed by the optical imaging system. For example, the imagingplane 791 may indicate one surface of the image sensor IS, on whichlight is received.

Tables 19 and 20 show characteristics of each lens (e.g., radius ofcurvature, thickness of the lens or distance between the lenses,refractive index, Abbe number, and focal length).

TABLE 19 Sur- Radius Thick- Re- face of ness or fractive Abbe Focal no.Item curvature distance index no. length S1 First lens 2.737 0.913 1.54656.0 6.262 S2 12.091 0.065 S3 Second 11.766 0.295 1.546 56.0 92.074 lensS4 15.223 0.059 S5 Third lens 9.481 0.242 1.677 19.2 −14.344 S6 4.7480.466 S7 Fourth −81.868 0.318 1.546 56.0 1505.037 lens S8 −74.556 0.273S9 Fifth lens 35.458 0.375 1.667 20.4 −46.461 S10 16.466 0.582 S11 Sixthlens 9.971 0.499 1.570 37.4 60.447 S12 13.773 0.538 S13 Seventh 3.6510.432 1.546 56.0 9.198 lens S14 12.801 0.090 S15 Eighth 13.900 0.4001.570 37.4 152.439 lens S16 16.373 0.765 S17 Ninth lens 6.079 0.4941.546 56.0 −5.791 S18 2.021 0.370 S19 Filter Infinity 0.110 1.518 64.2S20 Infinity 0.793 S21 Imaging Infinity plane

TABLE 20 f 6.84 f12 5.874 FOV 75.5 SAG11 0.77 SA11 41.6 SA12 7.1 SA218.6 SA22 2.9 SA31 15.5 SA32 28.1 SA41 9.6 SA42 16 SA51 39.4 SA52 32.3SA61 36 SA62 21.3 SA71 25.8 SA72 46.5 SA81 44.6 SA82 35.5 SA91 19.5 SA9228.1

A definition of a parameter illustrated in Table 20 may be the same asin the first example embodiment.

1.80 is an Fno of the optical imaging system 700 according to theseventh example embodiment of the present disclosure.

In the seventh example embodiment of the present disclosure, the firstlens 710 may have positive refractive power, and the convex firstsurface and the concave second surface.

The second lens 720 may have positive refractive power, and the convexfirst surface and the concave second surface.

The third lens 730 may have negative refractive power, and the convexfirst surface and the concave second surface.

The fourth lens 740 may have positive refractive power, and the concavefirst surface and the convex second surface.

The fifth lens 750 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the fifth lens 750. For example, the first surface of thefifth lens 750 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the fifthlens 750 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The sixth lens 760 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the sixth lens 760. For example, the first surface of thesixth lens 760 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the sixthlens 760 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The seventh lens 770 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the seventh lens 770. For example, the first surface of theseventh lens 770 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the seventhlens 770 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The eighth lens 780 may have positive refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the eighth lens 780. For example, the first surface of theeighth lens 780 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the eighthlens 780 may be concave in the paraxial region and convex in the regionother than the paraxial region.

The ninth lens 790 may have negative refractive power, and the firstsurface convex in the paraxial region and the second surface concave inthe paraxial region.

In addition, at least one inflection point may be formed in a regionother than the paraxial region on at least one of the first and secondsurfaces of the ninth lens 790. For example, the first surface of theninth lens 790 may be convex in the paraxial region and concave in theregion other than the paraxial region. The second surface of the ninthlens 790 may be concave in the paraxial region and convex in the regionother than the paraxial region.

Meanwhile, each surface of the first lens 710 to the ninth lens 790 mayhave an aspherical coefficient as illustrated in Table 21. For example,the object-side surfaces and image-side surfaces of the first lens 710to the ninth lens 790 may all be the aspherical surfaces.

TABLE 21 S1 S2 S3 S4 S5 S6 Conic constant −1.0266 24.0335 24.230723.9382 18.8359 2.2992 K 4^(th) coefficient A  3.3173E−03 −3.7820E−02−4.7741E−02 −5.6282E−02 −6.2015E−02 −1.5261E−02 6^(th) coefficient B 2.5198E−02  1.3900E−01  1.8031E−01  2.4938E−01  2.5824E−01 −1.8447E−028^(th) coefficient C −1.1560E−01 −4.5314E−01 −5.6768E−01 −9.0796E−01−1.0726E+00  2.5668E−01 10^(th) coefficient  3.2606E−01  1.0097E+00 1.2463E+00  2.3487E+00  3.1278E+00 −1.2628E+00 D 12^(th) coefficient−5.9252E−01 −1.5304E+00 −1.8674E+00 −4.2015E+00 −6.2312E+00  3.8227E+00E 14^(th) coefficient  7.2839E−01  1.6261E+00  1.9463E+00  5.2656E+00 8.6706E+00 −7.7089E+00 F 16^(th) coefficient −6.2551E−01 −1.2437E+00−1.4412E+00 −4.7109E+00 −8.6083E+00  1.0772E+01 G 18^(th) coefficient 3.8219E−01  6.9569E−01  7.6793E−01  3.0461E+00  6.1754E+00 −1.0651E+01H 20^(th) coefficient J −1.6713E−01 −2.8575E−01 −2.9490E−01 −1.4271E+00−3.2083E+00  7.5069E+00 22^(th) coefficient  5.1932E−02  8.5405E−02 8.0646E−02  4.7971E−01  1.1952E+00 −3.7479E+00 L 24^(th) coefficient−1.1197E−02 −1.8096E−02 −1.5245E−02 −1.1270E−01 −3.1104E−01  1.2951E+00M 26^(th) coefficient  1.5923E−03  2.5779E−03  1.8791E−03  1.7555E−02 5.3653E−02 −2.9462E−01 N 28^(th) coefficient −1.3431E−04 −2.2155E−04−1.3436E−04 −1.6269E−03 −5.5077E−03  3.9689E−02 O 30^(th) coefficient 5.0894E−06  8.6822E−06  4.1526E−06  6.7814E−05  2.5448E−04 −2.3987E−03P S7 S8 S9 S10 S11 S12 Conic constant −81.4017 87.7749 24.2949 −10.3370−10.3370 −90.0223 K 4^(th) coefficient A  8.0896E−04 −3.3623E−02−5.2464E−02 −3.7302E−02 −3.7302E−02 −6.2192E−02 6^(th) coefficient B−1.2826E−01  1.3662E−01  8.6427E−02 −1.0836E−02 −1.0836E−02  1.1929E−028^(th) coefficient C  6.4458E−01 −6.8945E−01 −3.3225E−01  9.5622E−02 9.5622E−02  1.5498E−02 10^(th) coefficient −2.0819E+00  2.2125E+00 8.9396E−01 −2.6462E−01 −2.6462E−01 −2.4386E−02 D 12^(th) coefficient 4.4988E+00 −4.7910E+00 −1.7057E+00  4.3956E−01  4.3956E−01  1.9316E−02E 14^(th) coefficient −6.7486E+00  7.2533E+00  2.3464E+00 −4.9189E−01−4.9189E−01 −1.0061E−02 F 16^(th) coefficient  7.1975E+00 −7.8451E+00−2.3588E+00  3.8738E−01  3.8738E−01  3.6485E−03 G 18^(th) coefficient−5.5228E+00  6.1316E+00  1.7438E+00 −2.1882E−01 −2.1882E−01 −9.3619E−04H 20^(th) coefficient J  3.0512E+00 −3.4678E+00 −9.4537E−01  8.9046E−02 8.9046E−02  1.7023E−04 22^(th) coefficient −1.1998E+00  1.4048E+00 3.7069E−01 −2.5877E−02 −2.5877E−02 −2.1729E−05 L 24^(th) coefficient 3.2658E−01 −3.9723E−01 −1.0212E−01  5.2370E−03  5.2370E−03  1.9006E−06M 26^(th) coefficient −5.8253E−02  7.4419E−02  1.8714E−02 −7.0104E−04−7.0104E−04 −1.0837E−07 N 28^(th) coefficient  6.0940E−03 −8.2984E−03−2.0447E−03  5.5792E−05  5.5792E−05  3.6270E−09 O 30^(th) coefficient−2.8140E−04  4.1682E−04  1.0063E−04 −1.9990E−06 −1.9990E−06 −5.4031E−11P S13 S14 S15 S16 S17 S18 Conic constant −4.4140 −30.8854 −43.906811.7047 11.7047 −6.9742 K 4^(th) coefficient A −1.6385E−03  3.0851E−02 2.3664E−02  2.1258E−02  2.1258E−02 −4.5730E−02 6^(th) coefficient B−1.2294E−02 −9.7328E−03  1.9367E−03  9.0168E−04  9.0168E−04  1.6097E−028^(th) coefficient C  1.0435E−02  1.6191E−04 −9.0794E−03 −5.6102E−03−5.6102E−03 −4.7436E−03 10^(th) coefficient −6.2453E−03  8.4752E−04 5.0791E−03  2.5025E−03  2.5025E−03  1.0861E−03 D 12^(th) coefficient 2.3860E−03 −4.7859E−04 −1.6615E−03 −6.2122E−04 −6.2122E−04 −1.9125E−04E 14^(th) coefficient −6.1158E−04  1.6363E−04  3.7048E−04  1.0272E−04 1.0272E−04  2.4908E−05 F 16^(th) coefficient  1.1017E−04 −3.7277E−05−5.9029E−05 −1.2068E−05 −1.2068E−05 −2.2689E−06 G 18^(th) coefficient−1.4269E−05  5.8200E−06  6.8511E−06  1.0486E−06  1.0486E−06  1.3347E−07H 20^(th) coefficient J  1.3351E−06 −6.3259E−07 −5.8229E−07 −6.9949E−08−6.9949E−08 −4.0838E−09 22^(th) coefficient −8.9363E−08  4.7922E−08 3.5953E−08  3.6942E−09  3.6942E−09 −2.4251E−11 L 24^(th) coefficient 4.1667E−09 −2.4852E−09 −1.5729E−09 −1.5393E−10 −1.5393E−10  7.6176E−12M 26^(th) coefficient −1.2840E−10  8.4198E−11  4.6272E−11  4.7316E−12 4.7316E−12 −3.0427E−13 N 28^(th) coefficient  2.3483E−12 −1.6801E−12−8.2119E−13 −9.2578E−14 −9.2578E−14  5.5689E−15 O 30^(th) coefficient−1.9290E−14  1.4978E−14  6.6401E−15  8.3947E−16  8.3947E−16 −4.0883E−17P

In addition, the optical imaging system configured as described abovemay have aberration characteristics illustrated in FIG. 14 .

Table 22 shows values of conditional expressions used for the opticalimaging system according to each example embodiment.

TABLE 22 1^(st) 2^(nd) 3^(rd) 5^(th) 6^(th) 7^(th) Conditional exampleexample example 4^(th) example example example expression embodimentembodiment embodiment embodiment embodiment embodiment embodiment 0.0 <f1/f < 1.4 0.8992 0.9239 0.9142 0.9104 0.9009 0.8992 0.9156 25 < v1-v3 <45 37.6 36.8 36.8 36.8 37.6 36.8 36.8 25 < v1-v5 < 45 35.6 35.6 35.635.6 35.6 35.6 35.6 15 < v1-v6 < 25 18.64 18.64 18.64 18.64 18.64 18.6418.64 15 < v7-v8 < 25 18.64 18.64 18.64 18.64 18.64 18.64 18.64 5 < f2/f< 50 18.7786 13.3471 13.4398 13.6416 18.2031 18.7786 13.4611 −5 < f3/f <0 −2.1653 −2.0931 −2.0947 −2.0869 −2.1616 −2.1653 −2.0971 |f4/f| > 50.0135.3627 94.3739 719.8098 104.9083 438.5214 135.3627 220.0346 −25 < f5/f< 0 −7.5090 −6.6402 −6.9382 −6.5482 −7.2553 −7.5090 −6.7926 |f6/f| > 2.010.2340 8.0021 8.7127 8.7253 10.1321 10.2340 8.8372 f7/f < 5.0 1.29711.2161 1.2624 1.2946 1.2969 1.2971 1.3447 TTL/f < 1.2 1.1782 1.18461.1797 1.1788 1.1778 1.1700 1.1812 |f1/f2| < 1.0 0.0479 0.0692 0.06800.0667 0.0495 0.0479 0.0680 −2 < f1/f3 < 0 −0.4153 −0.4414 −0.4364−0.4362 −0.4168 −0.4153 −0.4366 BFL/f < 0.3 0.1841 0.1873 0.1868 0.18490.1842 −0.4153 −0.4366 D1/f < 0.1 0.0094 0.0096 0.0098 0.0096 0.00960.0095 0.0095 D7/f < 0.1 0.0134 0.0133 0.0133 0.0146 0.0131 0.01300.0132 D6-D1-D2 > 0.2 0.3899 0.4242 0.4129 0.3998 0.3975 0.4148 0.4137SA11/CT1 > 40 45.2159 45.5479 46.0238 46.2503 44.6061 45.5094 45.5735SA92/CT9 > 50 56.0871 56.9341 57.1802 56.1045 56.0599 57.1363 56.8489SAG11/CT1 > 0.70 0.8358 0.8431 0.8498 0.8520 0.8266 0.8424 0.8435 0.7 <L7S2/L8S1 < 1 0.7542 0.9917 0.9045 0.7919 0.7821 0.9882 0.9209

As set forth above, the optical imaging system according to one or moreexample embodiments of the present disclosure may implement ahigh-resolution image.

While specific examples have been shown and described above, it will beapparent after an understanding of this disclosure that various changesin form and details may be made in these examples without departing fromthe spirit and scope of the claims and their equivalents. The examplesdescribed herein are to be considered in a descriptive sense only, andnot for purposes of limitation. Descriptions of features or aspects ineach example are to be considered as being applicable to similarfeatures or aspects in other examples. Suitable results may be achievedif the described techniques are performed in a different order, and/orif components in a described system, architecture, device, or circuitare combined in a different manner, and/or replaced or supplemented byother components or their equivalents. Therefore, the scope of thedisclosure is defined not by the detailed description, but by the claimsand their equivalents, and all variations within the scope of the claimsand their equivalents are to be construed as being included in thedisclosure.

What is claimed is:
 1. An optical imaging system comprising: a firstlens, a second lens, a third lens, a fourth lens, a fifth lens, a sixthlens, a seventh lens, an eighth lens, and a ninth lens, arranged inorder from an object side, wherein the first lens and the second lenseach have positive refractive power, and wherein 15<v7-v8<25 issatisfied, where v7 indicates an Abbe number of the seventh lens, and v8indicates an Abbe number of the eighth lens.
 2. The optical imagingsystem of claim 1, wherein 25<v1-v3<45 is satisfied, where v1 indicatesan Abbe number of the first lens, and v3 indicates an Abbe number of thethird lens.
 3. The optical imaging system of claim 2, wherein at leastone of 25<v1-v5<45 and 15<v1-v6<25 is satisfied, where v5 indicates anAbbe number of the fifth lens, and v6 indicates an Abbe number of thesixth lens.
 4. The optical imaging system of claim 1, wherein|f1/f2|<1.0 is satisfied, where f1 indicates a focal length of the firstlens, and f2 indicates a focal length of the second lens.
 5. The opticalimaging system of claim 4, wherein 0<f1/f<1.4 and 5<f2/f<50 aresatisfied, where f indicates a total focal length of the optical imagingsystem.
 6. The optical imaging system of claim 5, wherein −5<f3/f<0 issatisfied, where f3 indicates a focal length of the third lens.
 7. Theoptical imaging system of claim 6, wherein −2.0<f2/f3<0 is satisfied. 8.The optical imaging system of claim 4, wherein at least one of|f4/f|>50.0, −25<f5/f<0, |f6/f|>2.0, and f7/f<5.0 is satisfied, where f4indicates a focal length of the fourth lens, f5 indicates a focal lengthof the fifth lens, f6 indicates a focal length of the sixth lens, and f7indicates a focal length of the seventh lens.
 9. The optical imagingsystem of claim 4, wherein D1/f<0.1 is satisfied, where f indicates thetotal focal length of the optical imaging system, and D1 indicates adistance on an optical axis between an image-side surface of the firstlens and an object-side surface of the second lens.
 10. The opticalimaging system of claim 1, wherein D7/f<0.1 is satisfied, where findicates the total focal length of the optical imaging system, and D7indicates a distance on an optical axis between an image-side surface ofthe seventh lens and an object-side surface of the eighth lens.
 11. Theoptical imaging system of claim 1, wherein TTL/f<1.2 and BFL/f<0.3 aresatisfied, where TTL indicates a distance on an optical axis from anobject-side surface of the first lens to an imaging plane, and BFLindicates a distance on the optical axis from an image-side surface ofthe ninth lens to the imaging plane.
 12. The optical imaging system ofclaim 1, wherein D6-D1-D2>0.2 mm is satisfied, where D1 indicates thedistance on an optical axis between an image-side surface of the firstlens and an object-side surface of the second lens, D2 indicates adistance on the optical axis between an image-side surface of the secondlens and an object-side surface of the third lens, and D6 indicates adistance on the optical axis between an image-side surface of the sixthlens and an object-side surface of the seventh lens.
 13. The opticalimaging system of claim 1, wherein SA11/CT1>40°/mm is satisfied, whereSA11 indicates a sweep angle of the first lens at an end of an effectivediameter of its object-side surface, and CT1 indicates a thickness on anoptical axis of the first lens.
 14. The optical imaging system of claim1, wherein SA92/CT9>50°/mm is satisfied, where SA92 indicates a sweepangle of the ninth lens at an end of an effective diameter of itsimage-side surface, and CT9 indicates a thickness on an optical axis ofthe ninth lens.
 15. The optical imaging system of claim 1, whereinSAG11/CT1>0.7 is satisfied, where SAG11 indicates an SAG value of thefirst lens at the end of the effective diameter of its object-sidesurface, and CT1 indicates the thickness on an optical axis of the firstlens.
 16. The optical imaging system of claim 1, wherein the third lenshas negative refractive power, and the fourth lens has positive ornegative refractive power, and |f3|<|f4| is satisfied, where f3indicates the focal length of the third lens, and f4 indicates the focallength of the fourth lens.
 17. The optical imaging system of claim 1,wherein the third lens has negative refractive power, the fourth lenshas positive or negative refractive power, the fifth lens has negativerefractive power, the sixth lens has positive refractive power, theseventh lens has positive refractive power, the eighth lens has positiveor negative refractive power, and the ninth lens has negative refractivepower.
 18. An optical imaging system comprising: a first lens, a secondlens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventhlens, an eighth lens, and a ninth lens, arranged in order from an objectside, wherein the first lens and the second lens each have positiverefractive power, the seventh lens has an Abbe number different from anAbbe number of the eighth lens, and 0.5<L7S2/L8S1<1.2 is satisfied,where L7S2 indicates a radius of curvature of an image-side surface ofthe seventh lens, and L8S1 indicates a radius of curvature of anobject-side surface of the eighth lens.
 19. The optical imaging systemof claim 18, wherein the image-side surface of the seventh lens and theobject-side surface of the eighth lens each have at least one inflectionpoint in a region other than its paraxial region.
 20. The opticalimaging system of claim 19, wherein the third lens has negativerefractive power, and |f3|<|f4|, 25<v1-v3<45, and 15<v7-v8<25 aresatisfied, where v1 indicates an Abbe number of the first lens, v3indicates an Abbe number of the third lens, v7 indicates an Abbe numberof the seventh lens, v8 indicates an Abbe number of the eighth lens, f3indicates a focal length of the third lens, and f4 indicates a focallength of the fourth lens.
 21. An optical imaging system comprising: afirst lens, a second lens, a third lens, a fourth lens, a fifth lens, asixth lens, a seventh lens, an eighth lens, and a ninth lens, arrangedin order from an object side, wherein the sixth lens and the seventhlens each have positive refractive power, convex object-side surfaces,and concave image-side surfaces.
 22. The optical imaging system of claim21, wherein the fourth lens has a concave object-side surface and aconvex image-side surface, and wherein the eighth lens has a convexobject-side surface and a concave image-side surface.
 23. The opticalimaging system of claim 21, wherein the first lens and the second lenseach have positive refractive power, and wherein the third lens, thefifth lens, and the ninth lens each have negative refractive power. 24.The optical imaging system of claim 21, wherein 15<v7-v8<25 issatisfied, where v7 indicates an Abbe number of the seventh lens, and v8indicates an Abbe number of the eighth lens.
 25. The optical imagingsystem of claim 21, wherein 25<v1-v3<45 is satisfied, where v1 indicatesan Abbe number of the first lens, and v3 indicates an Abbe number of thethird lens.
 26. The optical imaging system of claim 21, wherein theseventh lens has an Abbe number different from an Abbe number of theeighth lens, and 0.5<L7S2/L8S1<1.2 is satisfied, where L7S2 indicates aradius of curvature of an image-side surface of the seventh lens, andL8S1 indicates a radius of curvature of an object-side surface of theeighth lens.
 27. The optical imaging system of claim 21, wherein one ormore of |f3|<|f4|, 25<v1-v5<45, and 15<v1-v6<25 are satisfied, where f3indicates a focal length of the third lens, f4 indicates a focal lengthof the fourth lens, v1 indicates an Abbe number of the first lens, v5indicates an Abbe number of the fifth lens, and v6 indicates an Abbenumber of the sixth lens.